The lady is a vamp! Julianne Hough steals the show in glamorous gown as she promotes Safe Haven with Josh Duhamel

Their names receive equal billing on the trailers for their new movie Safe Haven.
But when it comes to promoting the film Julianne Hough clearly has an advantage over Josh Duhamel.
The Dancing with the Stars professional showed off her vampy side was in a flirtatious mood as she hit up the red carpet in London on Wednesday.

What a siren! Julianne Hough attended An Evening with Nicholas Sparks with co-star Josh Duhamel in London where all eyes were on her and that gorgeous gown

Julianne and her leading man  were both on hand to celebrate An Evening with Nicholas Sparks at Waterstones Piccadilly.
The night belonged to Julianne, who sparkled in a floor-length, sleeveless maroon dress with patent leather top that clung to the outlines of her remarkable figure.
Wearing her golden-blonde hair in a loosely swept updo with escaping tendrils on both sides, Julianne preened for the cameras.
The 24-year-old beauty also posed with Josh, 40, who was casual in comparison in black jeans, grey jumper, black leather jacket and a grey and black patterned scarf for good measure.

Playing the coquette: Julianne shrugs for the camera while displaying that irresistible charm

Elegant: Julianne's dress showed off her dancer's curves to perfection

Julianne is thrilled to be starring in her first romantic leading role.
In the film, based on Sparks novel of the same name, Julianne plays a woman with a mysterious past who arrives in Southport, North Carolina where her bond with a widower forces her to deal with the dark secret that plagues her. 
Two days ago Julianne took to Twitter to share her excitement about the trip.
'London Town... Here We come! :)' she tweeted.

Flirtatious: Julianne gave her co-star Josh a dazzling smile because this is his movie too

Excited: Julianne posed with Josh and Nicholas Sparks, who wrote the novel on which the film is based

One of the first things that Julianne did upon arrival to the historic city was see Matilda the Musical at Covent Garden.
Josh and his newly pregnant wife Fergie, who traveled overseas with her handsome husband, went along too. 
Both ladies appeared to be getting along just fine as they smiled and chatted on their way to the theatre.

In good company: Josh stepped out to Covent Garden with pregnant wife Fergie to see Matilda the Musical on Tuesday evening

Julianne - who is dating Ryan Seacrest - struck up a friendhship with Fergie during the Safe Haven shoot.
Fergie, however, stole some of the thunder by announcing on Monday that she and Josh are expecting their first child.
'Josh & Me & BABY makes three!!!' the singer tweeted with the hashtag 'Mylovelybabybump', a reference to her hit song with the Black Eyed Peas.

Look who tagged along! Julianne joined Josh and Fergie to the theatre