Ever since his emergence from the lake as Mr Darcy in Pride and Prejudice Colin Firth has been a hit with the ladies.
But the Oscar-nominated star only has eyes for one woman - his wife of 15 years Livia Giuggiolli.
Speaking on Piers Morgan Tonight the 50-year-old promised that he would never be unfaithful.
In fact, every time he meets another beautiful woman he only ever thinks of his wife.
He said: "It does help to actually realise that however stunning the person who is, you know, fluttering eyelashes at you, she doesn’t do anything to match up to your wife."
The King's Speech actor added: "Maybe it’s shallow of me to have a wife that’s so beautiful but it makes things easier.
"To me she’s the most beautiful woman in the world."
The couple met in Colombia on the set of Nostromo in 1995, where Livia was a production assistant.
They married in 1997 and have two sons - Luca, 10, and seven-year-old Matteo - together.
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