According to EW, Steenburgen will guest-star as Charlotte, the "highly spirited and attractive" mother of Elizabeth Banks' character, Avery.
In her multi-episode arc, expect to see WASP-ish Charlotte going head to head with Jack (Alec Baldwin).
Hit the jump for more casting news.
'Mad Men' star Elisabeth Moss is in final negotiations for the lead role in a new BBC miniseries titled 'Top of the Lake.' The six-hour drama, written and directed by Jane Campion ('The Piano') and produced by Emile Sherman and Iain Canning ('The King's Speech') centers around a detective (Moss) investigating the disappearance of a 12 year-old pregnant girl who is also the daughter of a local drug lord. The series -- which will air on BBC Two in the UK -- has yet to land a US network, but the Sundance Channel is reportedly a possibility. [Deadline]
'One Life To Live' creator Agnes Nixon will guest-star on the show. In a mindbending meta twist, Nixon will play Agnes Dixon, creator of the show within a show, 'Fraternity Row,' before 'OLTL' goes off the air. Nixon shoots her scenes the week of November 17, to air starting January 9. [TV Guide]
Michael Rispoli has landed the male lead in ABC's comedy pilot 'The Manzanis.' The star of 'The Black Donnellys' will appear opposite Kirstie Alley in the multi-camera sitcom, which follows the Manzanis, an opinionated Italian-American family who move to a quiet New Jersey suburb and butt heads with their WASPy neighbors. [Deadline]