14/08/2014 12:45 BST | Updated 20/05/2015 06:12 BST

Sienna Miller Shows Off New Bob Hair Cut

Sienna Miller is sporting a sleek new haircut, and let's just say she can definitely pull off the long bob trend.

The 33-year-old British actress was wining and dining with her fiancé Tom Sturridge at Chiltern Firehouse (the name check celebrity haunt in London right now) on Wednesday night minus the signature long tresses.

If you're considering going short this summer, you could use Sienna's new side-swept parting and asymmetric cut as inspiration.

Maybe she needed a fresh new look after all that glamping at Glastonbury last weekend?

Check out this photo that Mary Charteris posted on Instagram of Sienna and Lily Allen hanging out ahead of Dolly Parton's headlining act. Note the wavy down 'do.

Hands down, the shorter look is the winning one.

As for Sienna's date night outfit? She played it low-key in a pair of grey skinny jeans, a slouchy cream jumper with gold embellishment on the sleeves and metallic peep-toe ankle boots. We'll also be doing the multiple stud earrings thing too.

LOVE SIENNA'S STYLE? Take a look through this gallery to see more sexy-making ensembles from the Brit beauty.

MORE! Watch all the latest news on Sienna right here.

Sienna Miller Admits to Doing 'Immoral' Things in Her Career