Peter Andre and Elen Rivas have sparked speculation they have rekindled their romance.

The pair - who split up in April after dating for five months - were spotted kissing at British reality TV star Amy Childs' 21st birthday party at Zilli Fish Restaurant in London's Soho, fuelling rumours they are back together.

One partygoer told the Daily Star newspaper: "They certainly looked like a couple again.

"In fact the word that evening was that they're back as boyfriend and girlfriend. They looked in great spirits and completely loved up.

"There is clearly chemistry still there. The kisses they were having looked quite steamy.

"Everyone was saying they must be an item again."

The 38-year-old singer failed to react when the 36-year-old Spanish model went to give him a kiss outside the party because cameras were pointing at the pair, but they embraced inside the restaurant.

Announcing their split in April, Peter - who has children Junior, six, and Princess Tiaamii, three, with ex-wife Katie Price - blamed his hectic work schedule.

He said at the time: "It's just not practical for me to be in any sort of relationship at the moment.

"I did adore Elen, she is so stunning. But the truth is, I just didn't get the chance to see her in the end. It's not for to ask her to put up with me being on the road for weeks at a time."

However, the pair have remained close and Peter admitted last month he is "still attracted" to Elen.

He said: "I met Elen for a coffee last week and it was great to see her. I'm not just saying this, but we really do get on like a house on fire. We're coffee buddies. Or CBS, as I like to call it!

"The decision to stop seeing each other in a romantic way was completely amicable and mutual and there are no hard feelings. I think we'll actually end up being really close friends, as we've got a lot of time for each other.

"There's No Doubt that we're still attracted to each other, but that isn't always enough."