Kunal Nayyar, Kevin Sussman Kunal Nayyar, Kevin Sussman

Stuart is here to stay on The Big Bang Theory.

Actor Kevin Sussman, who plays the comic book store manager, has been promoted to a series regular for the CBS comedy's sixth season, Deadline reports.

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Sussman has had a recurring role on The Big Bang Theory since Stuart was introduced in Season 2. The character won't appear in every episode of the show, but he will likely be in more than half of them, according to Deadline. Will his presence have any impact on Sheldon's (Jim Parsons) new relationship with Amy (Mayim Bialik)?

Sussman was a series regular on Ugly Betty and also had a recent guest stint on Weeds.