Brian Austin Green

Prior to his role on Beverly Hills, 90210, Green had a recurring role for three seasons (1986–1989) on the CBS primetime soap opera Knots Landing, playing the role of Brian Cunningham, the son of Abby Cunningham Ewing (Donna Mills). He reprised his role in the television miniseries Knots Landing: Back to the Cul-de-Sac (1997). He appeared in the 1987 pilot of Good Morning, Miss Bliss as Adam Montcrief.

Producer Aaron Spelling has stated that Green was cast in the role of David Silver much because he felt that Green's own personality resembled the personality they wanted that character to have. The character was often scripted to reflect Green's own interests. As the series progressed, the character began to experiment with hip hop music and DJing, as did Green himself. In 1996, Green dropped "Austin" from his professional name and attempted a career as a rapper, releasing one album, titled One Stop Carnival, produced by The Pharcyde member Slimkid3. In the 1990s, he was a guest star on Growing Pains, Parker Lewis Can't Lose, Melrose Place, Saved by the Bell: The College Years, Fantastic Four, Mad TV, Biker Mice from Mars, Malibu Shores, Sabrina, the Teenage Witch and Knots Landing: Back to the Cul-de-Sac.

In 1999, Green started dating his Beverly Hills, 90210 castmate Vanessa Marcil, whom he met on set. The two became engaged in July 2001 and had a son named Kassius Lijah Marcil-Green (born March 15, 2002). They planned to wed that year, but ended their relationship in 2003.

Green appeared briefly in the multiple award-winning Showtime drama series Resurrection Blvd. as Luke Bonner (2001–2004), a police officer attending law school. He had a cameo on Hope & Faith where he met Megan Fox; they started dating in 2004. He appeared on the ABC sitcom Freddie (2005) starring Freddie Prinze, Jr. He was a guest star on The Twilight Zone, Las Vegas and CSI: Crime Scene Investigation. He also appeared alongside former 90210 cast member Ian Ziering in the Tony Scott film Domino as parodies of themselves. Green appeared in a horror short called Grace, which was set around a miscarriage gone bad, and features Gilmore Girls actress Liza Weil as his love interest. It premiered at the Fangoria Weekend of Horrors on June 2, 2006, and was reworked as a full-length feature film (2009). He was a guest star on George Lopez in 2006 as Chris.

In 2004, Green began dating actress Megan Fox, having first met on the set of Hope & Faith when he was 30 years old and she was 18. Fox said Green was initially hesitant to enter a relationship with her due to the age difference. Fox said, “I had to convince him that I was slightly more responsible and well-spoken and had other things to bring to the table besides being 18." They became engaged in 2006 but broke off their engagement in February 2009. Later that year, their home was targeted by a group of fashion-motivated criminals known as "The Bling Ring", who initially targeted them to steal Fox's designer clothes.

Green guest-starred on the season 7 finale of CSI: Miami as Anthony Green. Green was cast in The CW's new drama pilot Body Politic, along with Minka Kelly, Gabrielle Union, and Jason Dohring. The series was not picked up for fall 2009. Green said in an interview that he was co-producing a big screen adaptation of Fathom, starring Megan Fox. On September 27, 2009, Green made a guest appearance on the television series Saturday Night Live in a skit involving girlfriend (now wife) Megan Fox. In the skit Green played a version of the Transformer Bumblebee in which Bumblebee is merely a man wearing a Bumblebee mask. Green was cast as Clay in One Tree Hill's seventh season. Green then left the cast because of scheduling conflicts and the role was then given to Robert Buckley; Green instead starred as superhero Callan in the Patrick Durham-directed movie Cross, which was released to DVD and download in May 2011.

In 2009, Green was cast as John Corben/Metallo in Smallville. He appeared in three episodes in the ninth season between 2009 and 2010, the first being the ninth-season premiere episode "Savior". The character is a war-time reporter, similar to the Silver Age John Corben. As a back-story for this version, he had been recently stationed in Afghanistan. When he meets Lois Lane, he expresses his distaste for vigilantes, particularly "the Blur" (Clark Kent). Corben is "reactivated" in the episode "Upgrade" after Tess' scientists are able to correct the initial design flaw in the Kryptonite heart that causes an adrenal overload and resulting psychosis. He reappears in the season finale episode "Prophecy" as a member of Marionette Ventures, with Supergirl assigned as his target. In 2010, Green appeared in a multi-episode story arc on the ABC series Desperate Housewives. He plays Keith Watson, Bree's contractor and lover for the first part of the season.

Green won the celebrity portion of the Grand Prix of Long Beach in early 2010.

In June 2010, Green and Fox announced they were engaged again, and several days later on June 24, the two wed at the Four Seasons resort on the island of Hawaii. Fox filed for divorce from Green on August 21, 2015, a few days after the couple announced their separation. They reconciled in early 2016. On April 25, 2019, Fox filed to dismiss the divorce in Los Angeles, California. In May 2020, Green announced that he and Fox had separated after nearly 10 years of marriage. In June 2020, she and Machine Gun Kelly went public about their relationship, several weeks after the release of Machine Gun Kelly's song "Bloody Valentine", which featured Fox in the music video.

In 2012, Green had a guest appearance in the sitcom Anger Management playing Sean, the boyfriend of Charlie's ex-wife, Jen in the first episode of the show. This episode broke a ratings record with 5.74 million viewers on its series debut night and ranks as the most-watched sitcom premiere in cable history. He returned to the show in the episode "Charlie Breaks Up With Kate" when Jen gets back with Sean. In June 2013, Green was promoted to series regular.

In March 2012, photographer Delbert Shaw sued Green and Fox in Los Angeles County Superior Court for allegedly assaulting him after he took photographs of the couple while Green and Fox were vacationing in Hawaii in 2010. In June 2012, Green said he was defending himself against Shaw and that Fox should not be included in the lawsuit.

Green was a guest star in the finale episode of the second season of Happy Endings. He played Chris, who meets dateless Penny via Skype. He returned in the first episode of the third season "Cazsh Dummy Spillionaires". In the same year, Green starred in the television series Wedding Band, about a group of friends who perform at weddings. In the TBS comedy, Green plays Tommy, the frontman for Mother of the Bride, a group of four buddies who aren't ready to give up the dream of being rock stars. On January 22, 2013, TBS cancelled the series after one season because of low ratings.

In April 2017, Green created a podcast entitled With Brian Austin Green.

Both Green and ex-wife Megan Fox are supporters of Generosity Water, and have funded the creation of over ten water wells for the organization. Through his podcast, Green organized a charity event to benefit the organization on September 1, 2018. Green's Beverly Hills, 90210 costar Ian Ziering was also in attendance.

Green hosted a second fundraiser for the organization the following year, on August 31, 2019. To coincide with the release of BH90210, the event was Beverly Hills, 90210 themed. It was a recorded podcast at Torrance High School, which served as West Beverly High in the series. Green's fellow Beverly Hills, 90210 cast members Ian Ziering, Gabrielle Carteris, Carol Potter, Douglas Emerson, Joe E. Tata, and Christine Elise McCarthy were in attendance. Tori Spelling was initially slated to attend, but ultimately recorded a video message in the wake of scheduling conflicts. Jason Priestley and James Eckhouse recorded video messages as well.

In October 2019, Green and Fox cohosted the Omaze "Fight4theAmazon" campaign.

In 2020, Green competed on season four of The Masked Singer as Giraffe. He was eliminated in his second appearance. Robin Thicke joined him in his encore of Kool and the Gang's "Get Down on It".