Lily Allen has reportedly welcomed her second daughter with husband Sam Cooper.

According to The Sun the singer gave birth to Marnie Rose Cooper on Tuesday (January 8).

A source told the newspaper: "Marnie is a real cutie. Sam and Lily are ecstatic about adding another girl to the family.

"A little sister for Ethel is brilliant news to lift the January blues for the family."

However, the couple has not made an official announcement confirming the news yet.

Allen and Cooper are already parents to daughter Ethel, who was born in November 2011.