Susan Sarandon had to spend hours in the make-up chair so she could look older for her role in the comedy Tammy, which also stars Melissa McCarthy.

The make-up artists working on the film had to use drastic prosthetics to age 67-year-old Sarandon so moviegoers would believe that she was 43-year-old McCarthy's onscreen granny. 

The Bridesmaids star revealed that even her co-star's feet and ankles had to be aged as "she is perfect from head to toe".

McCarthy told Jimmy Kimmel Live!: "The amount of effort that went into, like, taking the glow off her... like whose ankles are gorgeous? We had to make prosthetic ankles."

She continued: "I was like, 'Oh, for God's sake... Your ankles are too good looking?' And then I'd look at her ankles and I was like, 'Oh my God, you've got gorgeous ankles. They're young and vibrant'."

It took several takes to get some scenes right because Sarandon looked "too good".

McCarthy added: "I was like, 'Is it looking like pretty lighting? Do we both look too good...? No, just Susan... You're fine, Susan seems to be glowing from within'."

Tammy is released in Ireland this Friday, July 4.