Rebel Wilson lost more than three kilos in just four days on the set of the Cats movie.
The Aussie stars alongside Taylor Swift, James Corden, Judi Dench, Jennifer Hudson, Idris Elba and Ian McKellen in the musical film directed by Tom Hooper.
But the comedian found shooting her scenes was "pretty uncomfortable" due to the high temperature on set.
"I lost eight pounds (3.6kg) shooting my number in four days," Wilson told Entertainment Tonight.