Coldplay frontman Chris Martin is "happier than he's been in a long time" with girlfriend Annabelle Wallis and "just wants to settle down again."

Martin, who casually dated Jennifer Lawrence for a year following his split from ex-wife Gwyneth Paltrow in March 2014, is reportedly smitten with the British actress.

"She puts a huge smile on Chris' face. He's happier than he's been in a long time," a source close to the 38-year-old was quoted as saying by Us Weekly magazine, reports femalefirst.co.uk.

The couple haven't been dating for very long, but the "Magic" hitmaker "isn't seeing anyone else."

"He just wants to settle down again," the source said.

The duo made no attempt to hide their romance as they were spotted kissing and dancing along the streets in Paris earlier this month.

"They were with friends in Paris but spent as much time alone as they could," the source said about their Paris outing.

Rumours about the pair first surfaced when they were seen enjoying an intimate dinner date at Lucali in Brooklyn, New York in August shortly after Martin's split from Lawrence.