Sean Penn wants his relationship with Charlize Theron to work

London: Oscar-winning actor Sean Penn will do his best to keep his relationship with actress Charlize Theron steady.

Penn, 53, who made a public appearance with the 'Prometheus' star earlier this month, recently revealed about the romance between them, reported Contactmusic. TV personality Piers Morgan, who had a chat with the 'Milk' star, said Penn is interested in staying with the 35-year-old beauty.

"At 2am, Sean came over, and bear-hugged me. 'Congrats on a great night,' I said. 'And congrats on Charlize too.' He laughed. 'She's a keeper, that's for sure. Well, I'll do my best to keep her anyway!'," Morgan said.

During a recent charity event, even Theron was all praise for Penn. "'I'm so glad you two have got together,' I said, 'Sean's a great guy.' 'I know,' she smiled, putting her hand round his shoulder," added Morgan.

Theron and Penn were spotted sharing a kiss at a charity event recently and the couple had earlier fuelled romance rumours when both were spotted vacationing in Hawaii for the New Year.