Brown (left), Dobson (top right) and Halfpenny will join the show on 28 July
EastEnders star June Brown is to appear alongside former Albert Square regulars Anita Dobson and Jill Halfpenny in West End stage hit Calendar Girls.
Jerry Hall, Hollyoaks' Gemma Atkinson and Sara Crowe also feature in the show's new cast, which takes over at London's Noel Coward Theatre in July.
Calendar Girls was inspired by the Women's Institute members who stripped off for a charity calendar in 1999.
Their story spawned a hit 2003 film, on which Tim Firth's stage play is based.
Following a national tour, the play arrived in the West End in April with Sian Phillips, Patricia Hodge and Lynda Bellingham among its cast.
Brown, 82, has played Dot Cotton (now Branning) in EastEnders since 1985, the year the show first aired.
Earlier this year she received a Bafta nomination for best actress, for an episode in which she appeared solo.
Jill Baker, Richenda Carey and Jack Ryder - another former EastEnders cast member - are also among the incoming actors.
The new cast will be with the show from 28 July to 17 October.
Earlier this year, six of the original 'calendar girls' reunited for a new calendar marking the 10th anniversary of the original.