Lily Collins at the premiere of The Mortal Instruments: City Of Bones in Toronto (Photos)

She recently split with her boyfriend and co-star Jamie Campbell Bower.

And it seems Lily Collins is using any chance she has to show him what he’s missing.

Sparking enticement, the 24-year-old actress displayed her bare back in an angelic, lace-adorned gown to the Canadian premiere of The Mortal Instruments: City Of Bones in Toronto, Canada on Thursday.

The white, long-sleeved dress appeared demure from the front, but clearly gave off a different vibe from behind.

To go with her flowing frock, Lily styled her lustrous locks into a chic updo which was embellished with a silver head piece.

And completing her look, she highlighted her features with sultry plum shades of make-up.

From all of her promotional appearances, the British star seems to favour the hand-on-the-hip pose, frequently snapped in this position as of late.

But the Mirror Mirror actress didn’t appear to appreciate it when her ex-boyfriend placed his hand on her hip during a group shot alongside other co-stars Robert Sheehan and Kevin Zegers.

Instead, she was caught fronting an apathetic expression.

Jamie and Lily – who is the daughter of Phil Collins – first became an item while filming this movie but split just as it came out.

Yet the pair have remained amicable – critical, considering the numerous press tours and future shoots they’ll be together for considering that The Mortal Instruments is a six-part series.

City Of Bones follows New York teen Clary Fray, played by Lily Collins, who discovers that she has the powers of half-angel, half-human beings called shadowhunters.

It was one of the year’s bestselling novels, peaking at No. 8 on the New York Times bestseller list and racking up a rabid fanbase.

The Mortal Instruments: City of Bones, is in theaters on August 21, and the film adaptation for the sequel City Of Ashes begins production in late September and will arrive sometime in 2014.