Actress Laila Morse, who has played Mo Harris (Big Mo) on EastEnders since 2000, is the older sister of prolific film actor Gary Oldman. Born Maureen Oldman, the actress is older than her brother by almost 13 years.
Reportedly the actress' stage name of Laila Morse was suggested by her brother, although it has also been suggested that the pseudonym was the idea of Oldman's former girlfriend, actress Isabella Rossellini. The name is an anagram of mia sorella, which is Italian for my sister.
The siblings worked together on the 1997 film Nil by Mouth, which was directed by Oldman and in which Morse appeared as Janet. Oldman also wrote the screenplay, which won a 1998 BAFTA film award (as well as the BAFTA Alexander Korda Award for Best British Film). In addition, Morse's son Gerry Bromfield appeared in the film as a drug dealer.
Morse is currently gracing the stage in Croydon over the holiday season, playing Fairy Sugarsnap in Jack and the Beanstalk at Fairfield Halls through 6th January 2013. CBeebies presenter Sid Sloane is also in the cast as Jack.
See both Oldman siblings in this documentary clip about Nil by Mouth in the video below: