Bilbo Baggins, the main character in J.R.R. Tolkien's *The Hobbit* and *The Lord of the Rings*, is a fictional character. He is not an actor and did not play in any movies.
You might be thinking of Ian Holm, the actor who played Bilbo Baggins in the *Lord of the Rings* trilogy (2001-2003) directed by Peter Jackson.
In the *Hobbit* trilogy (2012-2014), Bilbo Baggins was played by Martin Freeman.