Seth Macfarlane is reportedly dating Alexis Knapp.

The 'Family Guy' creator has been enjoying a ''casual'' romance with the 'Pitch Perfect' actress, who he has known for some time.

A source told E! News: ''It's been going on for a little while. It's very casual but they are hanging out and he is having fun with her.

''They've know each other for three years and have been getting closer for over a year but they've only recently started seeing each other more frequently. They always had good chemistry.

''Alexis' star is on the rise. He thinks she's really talented.''

Alexis, 24, has a two-year-old daughter Kailani with ex-boyfriend Ryan Phillippe, while Seth, 39, was linked to Charlize Theron and had a brief relationship with 'Game of Thrones' actress Emilia Clarke earlier this year.

The split in March, after six months of dating, was blamed on the couple's work commitments.

A source said: ''They are no longer dating. It was really a location challenge. She has been in Europe shooting 'Game of Thrones' and he is based in California, so it was hard to make it work despite the distance. They have remained friends.''