Elder siblings Donna, Noreen, and Hugh Corcoran have extensive film and television credits as child actors during the 1950s. Donna, Noreen, and Kevin all appeared in the 1955 film Violent Saturday.

Between 1956 and 1960, Corcoran played several different (but similar) characters, each bearing the nickname Moochie. Although he was never a Mouseketeer, Corcoran appeared in three Mickey Mouse Club serials, beginning with Adventure in Dairyland, where he played Moochie McCandless, a farmer’s son. This was the first of Corcoran’s many Disney credits. He soon returned, as Montgomery (Moochie) O’Hara, in two Spin and Marty serials, The Further Adventures of Spin and Marty and The New Adventures of Spin and Marty.

Corcoran appeared in a Mouseketeer outfit with the name Moochie across his chest just once. In Disneyland: The Fourth Anniversary Show (1957), “Mouseketeer” Moochie repeatedly badgers Walt Disney for information about Zorro. Also on the fourth anniversary show, aired on September 11, 1957, segments were shown of Rainbow Road to Oz, a live-action film about characters in the Land of Oz. Inspired by L. Frank Baum’s Oz books, the film was to star some of the Mouseketeers, including Darlene Gillespie as Dorothy and Annette Funicello as Ozma, as well as Tommy Kirk and Corcoran.

Continuing his fictional Moochie roles, Corcoran played Montgomery “Moochie” Daniels in the 1959 Disney film The Shaggy Dog. He also starred as Moochie Morgan in Moochie of the Little League (1959) and Moochie of Pop Warner Football (1960), both for the Disney anthology series. Character actor Russ Conway played his father.

Brian Corcoran played Kevin’s brother, and Kerry, his sister, in the 1960 Daniel Boone miniseries on Walt Disney Presents, then on ABC. Brian also was Willie Winkie to Kevin Corcoran’s Boy Blue in the 1961 film Babes in Toyland. Brian Corcoran was Willie Slaughter in the TV Series Texas John Slaughter Disney Anthology Series 1960-1961.

Kevin Corcoran and Tommy Kirk played brothers in five films, beginning with 1957’s Old Yeller. The other films in this category were The Shaggy Dog (1959), Swiss Family Robinson (1960), Bon Voyage! (1962) and Savage Sam (sequel to Old Yeller, 1963). Fred MacMurray played their father in The Shaggy Dog and Bon Voyage!; Dorothy McGuire played their mother in Old Yeller and Swiss Family Robinson. In 1961, he did the voice of Goofy Jr. in the animated short Aquamania. He played a role in Wagon Train in the episode “The Cassie Vance Story”.

Corcoran largely retired from acting after A Tiger Walks, although he also appeared in the 1968 film Blue in a minor role. It was probably around the time of the latter film that he attended college. In an interview for the DVD release of The Shaggy Dog, he credits his studio teachers with having prepared him well for his college studies.

Kevin Corcoran was honored as a Disney Legend on October 9, 2006. Among the other recipients at the 2006 ceremony were the two lead actors in Corcoran’s Spin and Marty serials, Tim Considine and David Stollery, and Corcoran’s frequent co-star, Tommy Kirk, who was a veteran of The Mickey Mouse Club serials about The Hardy Boys.

Kevin Corcoran was the brother of Donna Corcoran, Noreen Corcoran (1943–2016), Hugh Corcoran, Brian Corcoran, Kerry Corcoran, and Kelly Corcoran (1958–2002). Another brother, Bill Corcoran Jr. (former Dean of Students at California State University, Fresno), died in 2007.

Kevin Corcoran and his wife, Laura Soltwedel, were married from 1972, until his death on October 6, 2015.

Corcoran was diagnosed with colorectal cancer at age sixty. He died from this illness at age sixty-six on October 6, 2015. His remains were cremated by the Neptune Society. His ashes were scattered into the Pacific Ocean ten days later.