In 1968, he won the Benidorm International Song Festival, a songwriter’s event in Spain, with the song “La vida sigue igual” (meaning “Life Goes On The Same”) which was used in the film La vida sigue igual about his own life. He then signed a deal with Discos Columbia, the Spanish branch of the Columbia Records company, and released his first studio album, titled Yo Canto, or I Sing. The album spent 15 weeks in the Spanish charts and peaked at #3. He represented Spain in the 1970 Eurovision Song Contest, finishing in fourth place behind Ireland’s winning entry, performed by Dana. His entry was the song “Gwendolyne.” Shortly after, he had a number one hit in many European countries with “Un Canto A Galicia”, sung in Galician, in honour of his father, who hailed from Galicia. That single sold 1 million copies in Germany. In 1975, he found success in the Italian market by recording a song exclusively in Italian, called “Se mi lasci non vale” or “If You Leave Me, It Can’t Be.” Notable albums from this decade are A flor de piel (1974, with the European hit “Manuela”), El amor (1975), and Soy (1973). He also sang in French: one of his popular songs in this language became “Je n’ai pas changé.”

On 29 January 1971, Iglesias married Isabel Preysler, a Filipina television host. Preysler, a Filipina of Spanish ancestry, was also a member of the wealthy and aristocratic Pérez de Tagle family. The couple had three children: Chábeli (born 3 September 1971), a socialite; Julio Jr. (born 25 February 1973), a singer; and Enrique (born 8 May 1975), an internationally successful singer-songwriter, actor, and record producer. In the 1970s, Iglesias and his family were extensively depicted on the front pages of international newspapers and magazines. The marriage ended in divorce in 1979.

Iglesias’s performance of the song “La Mer” (“The Sea”) is featured in the soundtrack of the 2011 film Tinker Tailor Soldier Spy. The performance comes from a live album that he recorded live at the Olympia in 1976.

Whenever Iglesias was not on tour, he spent his time at his Miami residence, purchased in 1978 for $650,000. The mansion on the private Indian Creek Island, whose interior design was made by Virginia Sipl, was placed on the market in 2006 for a quoted $28 million, making it one of the “Ten Most Expensive Homes in the South” in 2006 according to Forbes magazine.

In 1979, he moved to Miami, Florida, in the United States, signed a deal with CBS International and started singing in different languages such as English, French, Portuguese and German. Two years later, he released the album De niña a mujer, which he dedicated to his daughter, who appeared on the cover with him. From it came the first English-language hit of his career, a Spanish cover of “Begin the Beguine” which became number 1 in the United Kingdom; he also released a collection, Julio (1983). In 1984, he released 1100 Bel Air Place, the hit album which established him as a star in the English-speaking entertainment industry. It sold over three million albums in the United States alone. The first single, “To All the Girls I’ve Loved Before”, a duet with Willie Nelson, hit #1 on the Country charts and went Top Five in the Billboard Hot 100. It also featured “All of You”, in vocal duet with Diana Ross, a Top Twenty Pop hit, that climbed to #2 on the Adult Contemporary Chart with the help of a popular video. They also collaborated with The Beach Boys

Iglesias won a Grammy Award for Best Latin Pop Album in the 1988 Grammy Awards for the album Un hombre solo (“A Man Alone”). He recorded a duet with Stevie Wonder, “My Love”, in his Non Stop album, a crossover success in 1988. In the 1990s, Iglesias returned to his original Spanish melody in Tango (1996), nominated for Best Latin Pop Album at the 1998 Grammy Awards, losing to the Romances album by Mexican singer, Luis Miguel.

Iglesias made a cameo appearance as himself on The Golden Girls as Sophia Petrillo’s date on St. Valentine’s Day 1989. In 1993, he recorded Summer Wind with Frank Sinatra. In 1994, he released Crazy, including duets with Dolly Parton, Sting and Art Garfunkel. In 1995, Iglesias was the recipient of the Excellence Award at the 1995 Lo Nuestro Awards. In 2001, Iglesias was recognized as the Person of the Year by the Latin Recording Academy. A year later, Iglesias was inducted into the International Latin Music Hall of Fame.

In 2003, Julio released his album Divorcio (“Divorce”). In its first day of sales, Divorcio sold a record 350,000 albums in Spain, and reached the number 1 spot on the charts in Spain, Portugal, France, Italy, and Russia. In 2003 and 2004, aided by the success of his Divorcio album, Iglesias went on a ten-month world tour which took him from Europe to Asia and then on to North America, South America and Africa. More than half the shows on that tour sold out within days of going on sale. In December 2004, his Dutch girlfriend Miranda Rijnsburger and Iglesias himself recorded a duet of the Christmas song “Silent Night”. The song, which was not officially released, also included a voice message from Iglesias, Rijnsburger, and their four young children. The song was released online through the singer’s official website and a CD was included on their Christmas card as a holiday gift from the Iglesias family to their friends and fans around the world.

On 19 December 2005, Iglesias’s father died of a heart attack at the age of 90. A week before his death, it became known that his 42-year-old wife, Ronna Keith, was pregnant with their second child. Their first child, Jaime, was born on 18 May 2004. The second child, Ruth, was born on 26 July 2006.

In September 2006, Iglesias released a new English-language album, which he titled Romantic Classics. “I’ve chosen songs from the 1960s, 1970s and 1980s that I believe will come to be regarded as the new standards,” Iglesias stated in the album’s sleeve notes. The album featured his interpretations of Foreigner’s “I Want to Know What Love Is”, the Wham! selection “Careless Whisper”, and Richard Marx’s “Right Here Waiting”. Romantic Classics was Iglesias’s highest debut on the Billboard charts, entering at number 31 in the United States, 21 in Canada, 10 in Australia, and top spots across Europe and Asia. He returned to the studio to record songs in Filipino and Indonesian for his Asian releases of Romantic Classics, which helped propel record sales in the Asian entertainment industry. Iglesias promoted Romantic Classics in 2006; it was seen all over the world on television shows. In the United States, for example, he appeared on Dancing With The Stars, where he sang his version of “I Want To Know What Love Is”, Good Morning America, The View, Fox and Friends and Martha Stewart.

In 2008, Iglesias recorded another song as a gift to his fans. The family recorded “The Little Drummer Boy” in Spanish and English and included it in the family’s Christmas card. Iglesias also made investments in the Dominican Republic’s eastern town of Punta Cana, a major tourist destination, where he took to spending most of the year. He became a Dominican citizen in 2005.

In 2008, Iglesias made a music video with Gulnara Karimova, the daughter of Uzbek dictator Islam Karimov. In October 2012, he performed a concert in Equatorial Guinea where tickets were reportedly $1,000 each.

In 2008, after his house in Indian Creek did not sell at his asking price, he ordered it razed and said he planned to build another on the lot. In 2012, he purchased the property next door for $15 million and announced that he planned to build a new home on the combined properties.

After his divorce, Iglesias lived with Dutch model Miranda Rijnsburger, 22 years his junior, whom he married on 26 August 2010 in a small church in Marbella, Spain. They had five children: Miguel Alejandro Iglesias (born 7 September 1997), Rodrigo Iglesias (born 3 April 1999), twins Cristina and Victoria Iglesias (born 1 May 2001), and Guillermo Iglesias (born 5 May 2007). They took up residence in the Dominican Republic, where Iglesias had acquired several hotel complexes, as well as the Punta Cana International Airport, which he acquired jointly with other investors, including fashion designer Oscar de la Renta.

On 1 April 2013, in Beijing, he received two historic awards: First & Most Popular International Artist of All Time in China, an award given by Sony Music China and which was presented to Julio by the world-renowned Chinese artist Lang Lang, and the Guinness World Records for the Best-selling Male Latin Artist. As Iglesias is a composer and lyricist, some of his songs being of his own authorship and composition, on 23 April 2013, he was inducted into the Latin Songwriters Hall of Fame, alongside Armando Manzanero and José Feliciano.

In 2015, Iglesias was slated to perform a complete concert for the first time with his son Julio Iglesias Jr. in a tour in Romania, on 22 May at Sala Polivalentă in Cluj-Napoca and 2 July at Sala Palatului in the capital city, Bucharest.

Berklee College of Music awarded Iglesias an Honorary Doctorate in May 2015 in recognition of his achievements and influence in music and for his enduring contribution to American and international culture.