Their relationship has been up and down for the last few months, but Kelly Brook appeared to be a sending clear message when she stepped out with on/off boyfriend Billy Zane's engagement ring in London last night.

The model has been reluctant to wear the ring since her reconciliation with her actor boyfriend last month.

But Kelly, 28,  was all smiles as she flashed the sparkler on her left finger after dinner at The Ivy.

All Smiles: Kelly Brook as she left The Ivy restaurant wearing her engagement ring from Billy Zane

Looking astonishingly happy, Brook was glowing and seemed very pleased with herself.

The ex -Strictly Come Dancing star was obviously trying to make a statement, choosing the scene-to-be-seen celebrity haunt no doubt fully aware she would be centre of attention.

Over the moon: Kelly's colourful outfit matched her delighted mood last night in London at The Ivy

Sparkling: Kelly is just as happy showing off her ring now as she was last year

Wedding Bells? Kelly with Billy in Cannes this year

The sighting is bound to trigger rumours that the engagement with Billy, 42, is back on.

The turbulent couple rekindled their romance after their split earlier this year.

However, sightings of the pair together have been few and far between in recent weeks, with Kelly working on an upcoming US TV project in Virginia.

MailOnline exclusively reported that while the couple were apart, Zane was spotted flirting and trying to chat up girls in an LA nightclub last month.

Former Big Breakfast presenter Kelly decided to call off her engagement after deciding that at her age, she was too young to marry.

But after only a few weeks apart, it appeared the couple couldn't live without each other and were photographed holding hands outside a London cafe.

Kelly flew to Cannes in May to be by her beau's side as he promoted his new movie, The Man Who Came Back.

There the couple confirmed that they were back together.