The ‘Smile’ singer, who is dating Chemical Brothers star Ed Simons, discovered she was expecting last month but has only just informed her close family of the happy news.

A source said: “Lily is thrilled to be pregnant and can’t wait to become a mum. She’s a real family person.

“Ed’s very happy. He is really looking after her.”

Lily, 22, began dating Ed, who is 15 years her senior, in September and sources insist they are excited about their impending arrival.

One said: “They could not be happier.

“It’s the icing on the cake for Lily as she’s had an incredible 18 months. She is looking forward to finishing her new album early next year and releasing it before the birth of her first child.”