Sienna Miller makes a return to boho style in a flirty ruffled minidress

Sienna Miller has ditched her grungy style to make a return to the boho look which made her famous.

The actress, who is dating fellow actor Rhys Ifans, was seen out in Los Angeles yesterday wearing a thigh-grazing ruffled minidress and boots hugely reminiscent of the boho look which propelled her to style icon status.

Sienna's brown tiered dress made a refreshing change from her less glamorous wardrobe of late, which appears to be inspired by boyfriend Rhys's slacker style.

In with the old: Sienna's on-trend ruffled dress is a welcome change from her recent descent into grungy fashion. She showed off her look at LA's trendy Urth Cafe yesterday

The 26-year-old actress and Welsh-born Rhys, 39, were both seen dining at coffee house Urth Caffe in West Hollywood.

The trendy eaterie is fast becoming as famous as its patrons, having been dubbed a prime-spot for star-spotting by the Los Angeles Times.

Sienna and Rhys have been inseparable since they started dating in August last year.

Fashionista: It was just like the old days as Sienna turned heads in her frilly outfit yesterday in LA

The couple have enjoyed a number of holidays and now the actress has decamped to LA, with Rhys in tow, as she films new movie, GI Joe, which co-stars Dennis Quaid and Channing Tatum.

"This is definitely not an independent film — this is big-budget stuff... I finally get to really kick some butt."

Inseparable: Sienna and Rhys have decamped to LA while the actress films new movie GI Joe

The 26-year-old began shooting in Los Angeles last month.

In the film, she plays the villainous Baroness - a femme fatale skilled in espionage.

The actress is rumoured to have gained 5lb and has started intensive fitness training in preparation for the role.

She has said: "I've started taking boxing lessons, and I've also had to learn how to fire guns with live ammunition.

"I'm a baddie, running around kicking everyone while wearing tight, thigh-high boots.

"I'm getting muscles everywhere."

Next, Sienna is scheduled to star alongside Sean Bean in the romantic comedy A Woman Of No Importance.