Her most prominent television acting roles were those of rebellious teenager Suzanne Ross in Grange Hill and single mother Michelle Fowler in the BBC soap opera EastEnders.
[1] While at school in Barnsbury, Islington, she took up acting as a hobby and attended the Anna Scher children's theatre, which began a fast track into television work.
[1] At the age of nine Tully hosted the live television children's programme Our Show and later worked on The Saturday Banana with Bill Oddie.
In December 2016, EastEnders recast the role of Michelle Fowler to actress Jenna Russell after Tully repeatedly turned down offers to return.
The show's executive producer at the time, Sean O'Connor, has said that Tully gave her blessing for the recast to take place.