From Wikipedia: Barry Williams was born in Santa Monica, California to Doris May Moore and Canadian-born Frank Millar Blenkhorn of English, Scottish and German ancestry. He decided as a very young child that he wanted to be an actor, and in 1967 he made his television debut in an episode of Dragnet. He played guest roles in Adam-12, The Invaders, That Girl, Mission: Impossible and The Mod Squad before being cast as Greg Brady in The Brady Bunch sitcom in 1969. As the eldest of the kids, his story lines often involved his many romances, and as the Greg character reached his mid-teens the show’s producers began to groom and promote Williams as a teen idol.
With the show’s demise in 1974, Williams was unable to attract the type of high profile roles that might have expanded on his earlier success. He resumed playing guest roles on television, and became involved in musical theater, touring with productions such as Grease, The Sound of Music and West Side Story, as well as making unsuccessful attempts to establish a career as a recording artist. However he was later able to capitalize on his type-cast of being “Greg Brady”. Amid a procession of appearances in TV and movies that played up his famous teen role, Williams ended up landing a role that was quite a depature from the Brady state of mind, and that could have shaken off that image if the role was held longer: briefly in 1984, he was tapped to play English con man Hannibal, who conspired with Holly Sutton Scorpio (Emma Samms) on the top-rated General Hospital. Although the appearance was well-received, Williams was not asked back after his initial story arc was concluded.
His 1992 autobiography, Growing Up Brady: I Was a Teenage Greg, written with Chris Kreski, spent three months on the New York Times bestseller list. The book was adapted into a 2000 TV movie titled Growing Up Brady that starred Adam Brody as Williams.
Always proud of his success with The Brady Bunch, Williams has appeared in various Brady TV movie reunions, including the hit 1988 Christmas movie “A Very Brady Christmas” where his sole family problem is missing his wife, Nora. His problem is solved when Nora shows up at the Brady house on Christmas with a poinsettia in hand. He also has built a cabaret act that pays tribute to his past, and has played himself in the film Dickie Roberts: Former Child Star (2003), which is about a former child star who finds himself out of work. In 2000, when Eminem had a hit with “The Real Slim Shady,” Williams released his own parody version, “The Real Greg Brady.”