Jonathan Rhys Meyers has been spotted wearing what appears to be an engagement ring, prompting speculation that he may be about to tie the knot.

The Tudors star has been dating Reena Hammer, heiress to the Ruby & Millie cosmetics line, on-and-off since 2004, but refused to confirm that they were planning to marry.

But he admitted that he is madly in love, saying: "I think it's nice to go out with someone who is smarter than you. It's very sexy. I believe the greatest erogenous zone in the body sits on your shoulders."

He also wore the ring during an appearance on MTV show Trl on Monday, adding further fuel to the rumours.