Brown replaces Neil Jackson in the role of womanising bad boy Julian, reports TVLine.
Infamous stars Meagan Good as Detective Joanna Locasto, who returns undercover to the wealthy Bowers family she grew up in as the maid's daughter, in order to solve the death of a famous socialite who was her best friend.
The new show also features Victor Garber, Katherine LaNasa, Tate Donovan and Ella Rae Peck.
Brown was previously cast in 90210 in a recurring role for its upcoming fifth season.
His television credits include True Blood, Private Practice, Hart of Dixie and Scandal.
