Marion Cotillard and partner Guillaume Canet welcome a baby girl

Marion Cotillard and her long-term partner Guillaume Canet have a very special reason to celebrate, the pair have announced the birth of their second child!

A rep for the Hollywood couple confirmed exclusively to People magazine that the pair have become parents for the second time.

Limited details were given, with the rep mysteriously saying the birth had happened 'recently'. Although they did reveal that Marion and Guillaume now have a baby girl, there was no mention of baby names at this stage.

The acting couple's newborn baby girl will be a lovely little sister for the five-year-old son that the couple already share, named Marcel.

Marion, who is not only a French actress but singer, songwriter and musician as well, originally announced her pregnancy back in September.

The 41-year-old took to Instagram to delight fans with the sweet news, writing a lengthy caption which described her long-term partner as 'my love, my best friend, the only one I need'.

At the time she said of her pregnancy, 'Many years ago, I met the man of my life, father of our son and of the baby we are expecting. He is my love, my best friend, the only one that I need.'

The couple were last seen out together in February for the premiere of their latest film Rock'N Roll, which was directed by Guillaume and romantically stars them both.

This will be the third film that the parent team will have appeared in together, the second being 2009's The Last Flight.

Marion and Guillaume first began dating a decade ago when they met on the set of film Love Me If You Dare. This was their first experience acting together, and clearly it went very well!

Congratulations to the lovely couple!