'Twilight' Star Joins 'Pan Am,' 50 Cent Books Fox Role and More Casting News

'Twilight' star Ashley Greene has joined the cast of 'Pan Am.' According to EW, Alice Cullen Greene will appear in three episodes of the ABC drama.

Greene will play a debutante who has a connection to Ted (Michael Mosley). Look for the actress to make her debut in the Dec. 5 episode, 'Kiss Kiss Bang Bang.'

'Pan Am' has yet to receive a full season order. The network ordered more scripts of the freshman drama, but ABC is playing a wait and see game with the ratings.

Want more 'Pan Am' scoop? Check out our interviews with the stars about the Nov. 13 episode.

In other casting news ...

50 Cent will make a rare TV guest star appearance in 'The Finder.' The rapper/actor will play Big Glade a successful music mogul who enlists Walter (Geoff Stults) to help him find the lost songs of a dead artist from his label. [TVLine]

'Eureka' star Salli Richardson-Whitfield will guest star on 'The Finder' as well. She'll play Athena Brooks, the lawyer representing 50 Cent's character, Big Glade. [TVLine]

Paul Bettany will star in Showtime's new pilot, 'Masters of Sex.' Based on the book 'Masters of Sex: The Life and Times of William Masters and Virginia Johnson, the Couple Who Taught America How to Love,' the show will chronicle the lives of 1960s sexuality pioneers Masters (Bettany) and Johnson. The two are credited with sparking the sexual revolution. [Deadline]

TBS's 'The Wedding Band' has tapped actors from 'That 70s Show,' 'Bridesmaids' and 'Scrubs' for guest roles. Wendi McLendon-Covey, Kurtwood Smith, Donald Faison, Ashley Williams and Molly Sims will guest in the new comedy series about a who perform in a band. [EW]