Reese Witherspoon is engaged.

The 'Monsters Vs. Aliens' actress has fuelled rumours she is set to tie the knot with partner Jake Gyllenhaal after she was spotted flaunting a gold band on her wedding finger.

A source said: "Reese looked delighted, and she was definitely showing off the ring. She kept holding her finger up for people to see, she even flashed it around when she was getting in her car."

A photograph taken by X17Online reveals the band is made up of three interlocking strips of gold, two of which have solid gold baubles on them. A small golden star is stuck to the top strip, and sits against Reese's finger.

Neither Reese nor Jake's representatives have commented on the claims.

This is not the first time it has been reported the couple - who began dating in 2007 - are planning to marry.

Earlier this year, Jake was spotted ring shopping in New York.

In March, it was claimed Reese removed a sparkly band during a photo shoot as she didn't want people to know she was planning to walk down the aisle.

A source said at the time: "It was gorgeous, and everyone noticed it right away. But she took it off as soon as she saw people staring. Reese stuffed it in her bag and didn't put it on again the rest of the day."