She made her acting debut as a waitress in the 1973 British film
The Final Programme. She later played role of
Trillian in the
TV series of
Douglas Adams's ''
The Hitchhiker's Guide to the Galaxy''. She has made guest appearances on shows, such as
Philip Marlowe, Private Eye,
Casualty,
New Tricks,
Holby City,
Uncle,
Doctors and
White Van Man.
Other acting and voice roles Dickinson and then husband
Peter Davison appeared together in
Doctor Who producer
John Nathan-Turner's production of the holiday
pantomime Cinderella in 1983. They also appeared in a stage production of
The Owl and the Pussycat, and
Barefoot in the Park, a London stage production from 1984, as a pair of American newlyweds adjusting to life in their new high-rise apartment. In 1997, she played Eunice Hubbel in
Peter Hall's production of
A Streetcar Named Desire at
Theatre Royal, Haymarket. She played Queen Camilla in a Carlisle pantomime production of
Snow White & the Seven Dwarves in 2007, and the following year played the Fairy Godmother at the Towngate Theatre, Basildon's production of
Cinderella, reprising the role in the 2009
Harlow Playhouse theatre production of
Cinderella alongside her now-husband, Mark Osmond. From December 18, 2010, to January 9, 2011, Dickinson played the evil Queen Maleficent in the pantomime
Snow White and the Seven Dwarfs at the
Corn Exchange in
Exeter. From December 13, 2014, to January 4, 2015, Dickinson played Queen Whoppa in the pantomime
Jack and the Beanstalk at Exeter Corn Exchange. She played Debbie in
White Van Man series 1, episode 5 "Honest", first broadcast on April 12, 2011. The series stars her daughter
Georgia Tennant. In
The Amazing World of Gumball Dickinson provides many voices including those of Granny Jojo, Mrs. Jotunheim, Karen, Felicity Parham, and the cupcake woman. She is the voice of Grandma Tracey in the 2015
Thunderbirds revival. In 2014, Dickinson understudied
Angela Lansbury in the West End production of
Blithe Spirit – co-starring
Simon Jones, with whom she had worked on ''The Hitchhiker's Guide to the Galaxy'' – but she never got to perform Madame Arcati, other than in the public understudy run, as Lansbury did not miss a single performance. ==Personal life==