Lionel Richie reveals nickname he uses instead of grandpa

Lionel Richie refuses to be called grandpa and has revealed the sweet name daughter Sofia Richie's baby girl will call him.

The 74-year-old singer's youngest daughter Sofia, 25, is expecting her first child with husband Elliot Grainge, 30, and Lionel couldn't be more thrilled for the couple.

He gushed to 'Entertainment Tonight': "My baby is having a baby, and I'm so thrilled for Elliot and Sofia. They are just over the moon."

However, the little one won't have a traditional name for her grandparent, with Lionel revealing he will be known as "Pop-pop."

The 'Hello' hitmaker also revealed he keeps telling the couple to keep some privacy after they revealed the unborn tot's gender to the world with a pink confetti cannon.

He said: "You know, there is no secret with those two! I keep saying, 'Keep it a secret, OK?' But yes, that's what's happening. I'm so happy."

Sharing his nickname for his grandchildren, he said: "I'm Pop-pop.

"We don't get the 'grandpa,' yeah, that's a little deep. Pop-pop is where we're going."

Lionel is also a father to adoptive daughter Nicole, 42 - who has Harlow, 16, and Sparrow, 14, with husband Joel Madden - as well as Miles, 29, with ex-wife Diane Alexander.