Early work

At the age of 51, Morse made her professional acting debut as Janet in the 1997 film Nil by Mouth. The BAFTA winning film also marked the debut of her brother Gary, as a writer and director. Morse's performance as the matriarch won her the award of 'Most Promising Newcomer in any Category' at the British Independent Film Awards.^[5]

Morse's television debut was as Janice Ryan in an episode of The Bill, which was followed by a regular role as Honky Mum in the BBC sitcom Honky Sausages, and the character Molly in the 1999 television production of Great Expectations.^[6] In 2000, Morse played Laila in the film Love, Honour and Obey.

EastEnders

In September 2000, Morse made her first appearance as Mo Harris in the BBC soap opera EastEnders. Introduced as the matriarch of the Slater family, her first scene in the soap was alongside Pam St Clement, who played Pat Butcher. A couple of weeks later, a television critic said that Morse had acted like "a lump of cardboard". Recalling the article, Morse replied: "I daresay he was right! I was bloody petrified." She admitted that it was only three years later that she started to feel comfortable on set.^[7] Morse temporarily left EastEnders in January 2016, after appearing on a recurring basis since July 2012. In June 2017, Morse expressed interest in returning to EastEnders as she felt that she never "officially left". In December 2017, it was announced that Morse would be returning to the show to play Mo.^[8] She returned in March 2018, after being re-introduced alongside Jean (Gillian Wright) and Kat Slater (Jessie Wallace). In February 2021, it was announced that Morse would be departing the soap again, with the character's exit scenes airing in June 2021.^[9] A year later, it was announced that Morse would reprise the role for a short stint later that year, with the character appearing in five episodes between August and September 2022.^[10] In February 2024, it was announced that Morse would reprising the role on a permanent basis, following a storyline accommodating the return of Freddie Slater (Bobby Brazier).^[11][12]

Other work

In 2011, Morse made a return to film when she appeared as Aunt Queenie in the film Big Fat Gypsy Gangster, written, produced and starring Ricky Grover.^[13] In December 2012, Morse made her pantomime debut as the Fairy in a production of Jack and the Beanstalk.^[14]

In January 2012, Morse took part in the seventh series of ITV celebrity edition skating show Dancing on Ice. She was paired with Łukasz Różycki and they second were the second couple to be eliminated.^[15]

Morse published her autobiography Just A Mo in 2013.^[16] In November 2013, Morse participated in the thirteenth series of I'm a Celebrity...Get Me Out of Here! and was the second participant to be voted out of the series on 2 December.^[17]

In June 2016, it was announced that she would be taking part in the BBC series of Celebrity Masterchef.^[18] The series was won by Alexis Conran.^[19]

In 2019, Morse appeared as an BPRD employee in Hellboy.^[20] In 2021, it was announced that Morse was leaving EastEnders when her contract ended.^[21]

In 2021, Morse took part in the ITV series Strictly the Real Full Monty, where she was partnered with Homes Under the Hammer presenter Martin Roberts. Morse was praised by viewers when she revealed her breast cancer scars.^[22]