Casting News: John Corbett Books Arc on 'Parenthood,' Brian Austin Green and Harold Perrineau Land TBS Pilot and More

Talk about a role reversal: John Corbett is going from loving, all-American dad on 'The United States of Tara' to deadbeat dad/musician ex-husband of Lauren Graham's Sarah on 'Parenthood.'

According to Deadline, Corbett's character, Seth, will pay a visit to the Braverman clan while he's in town to play some shows with his band. Corbett's first appearance is scheduled to air in March.

'Sons of Anarchy' actor Darin Heames played Seth in the pilot.

In other casting news ...

• Meredith and Lexie Grey are about to get a new -- and very young -- mother figure. Former 'All My Children' star Alexa Havins will shake up 'Grey's Anatomy' in February as the much-younger love of Grey's father, Thatcher. [TV Guide]

• Brian Austin Green and Harold Perrineau will costar in a TBS comedy pilot together. 'The Wedding Band' will follow a group of guys who escape the stress of their lives by playing in a wedding band together. [The Hollywood Reporter]

• 'Bones' actor Joel David Moore is heading back to TV. The 'Avatar' actor will play the deputy director of a tsunami-tracking office on 'Hawaii Five-0.' [Movieline]

• 'The Defenders' has added a new recurring character. Kuno Becker will play a former undercover DEA agent-turned-repo man. [TV Guide]

• MTV's 'Inbetweeners' has found its female lead. Alex Frnka will star as the hot, popular girl the not completely geeky and not completely cool main characters lust after. [Deadline]

• The USA Network pilot 'Eden' has cast its two leads. 'Heroes' actor Nick D'Agosto and former 'Dollhouse' star Enver Gjokaj will play a hotel concierge and his escaped con cousin. [TV Guide]

• Sarah Bolger has joined the cast of the Fox pilot 'Locke & Key.' The new show from producers Alex Kurtzman and Roberto Orci is based on a comic book and follows a family as they try to rebuild their lives after a tragedy. [Deadline]