“They couldn’t be happier,” Jennifer Allen, Matt’s rep says “They’re so excited!”

The couple stepped out Sunday night at the Empire Film Awards in London. Luciana was glowing (and sporting a baby bump).

This is the third child for the family: Daughter Isabella was born in June 2006, and Luciana has a 9-year-old daughter, Alexia, from a previous marriage.

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PHOTOCREDIT:Jon Furniss /WIREIMAGE.COM