Julie White and Kiersten Warren have signed on to join the cast of ABC's dramedy Desperate Housewives as recurring characters.

They will both appear during the show's season finale; according to The Hollywood Reporter, they're described as pivotal to the show's story lines next season. White's character will have a connection to Orson (Kyle MacLachlan), while Warren's character will be a wrench in Lynette (Felicity Huffman) and Tom's (Doug Savant) marriage.

You can find out who they play on the Desperate Housewives season finale Sunday, May 21st on ABC.