Lindsay Lohan was the picture of happiness as she stepped out with girlfriend Samantha Ronson for a night out with her family.

Just days after the couple's romantic relationship was finally confirmed after a year of rumours, the pair arrived hand in hand at a party in New York City last night.

The 22-year-old actress went for a feminine, glamorous look in a multi-coloured lame mini-dress and high heels, while DJ Samantha, 30, contrasted in jeans, white vest and a checked shirt.

Togetherness: Lindsay Lohan and Samantha Ronson are inseparable as they arrive at a beauty firm's New York party

Despite their dramatically differing dress, it appears Samantha's love for fedora hats is rubbing off on the Mean Girls star after they both stepped out in the headgear.

The couple met up with Lindsay's manager mother Dina and younger brother Michael Jnr, 20, at the Sephora’s Ten Years Of Gorgeous Party at the Angel Orensanz Foundation.

As well as giving Lindsay an opportunity to spend quality time with her partner and family, Samantha was also hard at work DJing at the bash.

After celebrating her 22nd birthday earlier this month, Lindsay told of how settled and content she was with life after a rocky few years.

Hat's off to you: The Fedora-clad couple arrive at the Angel Orensanz Foundation in New York last night

Mommy and me: Lindsay Lohan cuddles up to her youthful mother Dina Lohan at the party

She said: 'I just wanna live a happy healthy year, continue on the path that I've been on and be with the person I care about. And my family.'

Earlier this week, Daisy Lowe - the girlfriend of Samantha's producer brother Mark Ronson - spoke of the couple's happiness.

She told the Daily Mirror: 'Her and Sam make a lovely couple - they seem really happy. Their relationship is totally genuine. And they're just so sweet together.'

Earlier this summer, Dina also gave her approval of Lindsay's relationship with Samantha.

She said: 'If she's happy, I'm happy. That's all I'll say. Samantha's great. I've known her and her family for ten years.

'Samantha is an angel.'

Family outing: Dina Lohan poses with son Michael Lohan, 20, as they enter the party to meet up with Lindsay Lohan and Samantha Ronson