I got a question for you: Mathew Frazer Horne (born 6 September 1978) is an English actor, comedian, television presenter, and narrator. He is best known for appearing on several BBC sketch shows and sitcoms, most notably Gavin & Stacey (as Gavin Shipman), The Catherine Tate Show, 20 Things to do Before You're 30, Teachers, Horne and Corden, and Bad Education.

Answer this question: actor who played gavin in gavin and stacey?
Let's think first:
To answer the above question, the relevant sentence is: He is best known for appearing on several BBC sketch shows and sitcoms, most notably Gavin & Stacey (as Gavin Shipman), The Catherine Tate Show, 20 Things to do Before You're 30, Teachers, Horne and Corden, and Bad Education.
Therefore, the answer is Mathew Frazer Horne.