United Kingdom, Jan. 29 -- Bradley Cooper thought Amy Schumer was 50 years old.

The Hollywood star celebrated his 50th birthday on January 5, and he mistakenly asked Amy whether she'd already reached the milestone.

During an appearance on 'The Tonight Show Starring Jimmy Fallon', Amy shared: "I saw him, and you know, 'how are you?', and he said 'You know, I turned 50 this year' and he goes, 'You 50?'"

Amy recalled being shocked by Bradley's question.

The comedian continued: "I tried to recover - you know, I'm 43 - so I'm like, 'I will be 50! But I'm not 50 yet! Yeah no, I'm not, Bradley, but thank you for thinking of me!'"

Amy also revealed that she's often mistaken for fellow comedy stars Melissa McCarthy and Rebel Wilson.

She said...