Ryan Devlin

Sh-- My Dad Says has found its son in Ryan Devlin.

The actor has joined the CBS pilot, which is based on the Twitter account of 29-year-old Justin Halpern, as the son to William Shatner's titular dad, according to The Hollywood Reporter.

Shatner cast in Sh-- My Dad Says

Halpern, who co-wrote the pilot, launched his Twitter account in August to document the random and sometimes profane comments that he says come out of his 73-year-old father's mouth. The account currently has more than 1.2 million followers.

A former host of ET on MTV and Rock the Cradle, Devlin, 29, currently recurs on Cougar Town.