United Kingdom, May 8 -- Rebel Wilson hasn't spoken to Isla Fisher since she made her bombshell claims about Sacha Baron Cohen in her memoir 'Rising Rebel'.

The 44-year-old actress branded her 'Grismby' co-star, 52, a "massive a******" in her book just before Sacha and his wife Isla announced their divorce, and Rebel has admitted she hasn't reached out to her friend yet.

During an appearance on the 'The Kyle and Jackie O Show' where she was asked if she has been in contact with the 'Wedding Crashers' actress, Rebel said: "I haven't spoken to her.

"Obviously, I used to be friends with her before all this happened. We did a movie together called 'Bachelorette'."

The 'Pitch Perfect' actress made her claims about Sacha just a week before ...