Amanda Seyfried has a tattoo of the word 'Minge' on her foot.

The American actress decided to get the etching - which is a British slang term for vagina - after her 'Mamma Mia!' co-star Colin Firth used the word repeatedly while filming and found it hilarious when she discovered what it meant.

She told Britain's Glamour magazine: "My and my best friend Rachel McDowell, who was in 'Mamma Mia!' with me, have matching tattoos, which say 'Minge'. I've never really been a fan of tattoos, but I wanted to see what it felt like. Rachel has a lot of them.

"Anyway, Colin Firth used to say that word on the set and Rachel had to explain to me what it meant. So it's on my foot. It's to make me laugh, and every time I look at it, I do."

The blonde beauty - who is dating actor Dominic Cooper - admits she always laughs at crude things and isn't as innocent as she looks.

She said: "I have a dirty sense of humour. I can be blunt and vulgar."