Credit: Dave Hogan/Getty Images

Time to "smile"!

British singer Lily Allen and her husband Sam Cooper have welcomed a baby girl, according to Us Weekly. Their newborn daughter's name is Marnie Rose Cooper, and this is the couple's second child together.

The 27-year-old Lily took to Twitter on January 10 to announce the happy news. "Quite overwhelmed by all the well wishing going on. THANKYOU everybody x x x," she wrote.

The couple's first child, Ethel Mary, was born in November 2011, just over a year ago.

When the couple learned of the second pregnancy, they were a bit taken a back.

"It was a surprise but Lily and Sam are thrilled," a source said at the time. "The pair of them have loved every minute of parenthood so far and wanted to expand their brood quickly. So it's great timing."

Lily is best known for her smash 2006 hit, "Smile."

We wish the happy family all the best! No frowns allowed.

Source: Us Weekly