Carey Mulligan shrouds her waif-like frame in a denim shirt dress as she rents bikes with Marcus Mumford on her 30th birthday

Hollywood star Carey Mulligan proved that she's pretty grounded this week when she celebrated her 30th birthday on a bike ride with her husband.

The A-lister, who reached the landmark age on Thursday, took a jaunt around New York City on rented bikes with Mumford & Sons' Marcus Mumford to celebrate that day.

Carey looked wholesome in a denim shirt dress and Birkenstock sandals, holding her hands with fellow Brit Marcus as they marked the milestone birthday with a down-to-earth day out in the US capital.

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Birthday girl: Actress Carey Mulligan spent her 30th birthday on rented bicycles in New York on Thursday

Birthday girl: Actress Carey Mulligan spent her 30th birthday on rented bicycles in New York on Thursday

The Great Gatsby actress shrouded her waif-like shape with a billowing dress design and went almost unrecognised with her tresses tied into a low bun and shades on her nose.

Marcus meanwhile, sported his characteristic indie image in a double denim look with brown Chelsea boots.

And while she stepped out unhindered by bags, he toted their day out belongings and stowed it in the front basket of the rented bike.

Cute day out: She spent the day with her husband Marcus Mumford and they held hands on the day out

Cute day out: She spent the day with her husband Marcus Mumford and they held hands on the day out

Fun times: The British duo rented bicycles to take a tour of the city where they're currently living

Fun times: The British duo rented bicycles to take a tour of the city where they're currently living

Cute couple: The duo were far from showbiz in their wholesome outfits and went virtually unnoticed

Cute couple: The duo were far from showbiz in their wholesome outfits and went virtually unnoticed

Carey has been a prominent figure in Hollywood since her breakthrough role in 2009's An Education, but now says she's in a 'privileged ­position' where she can take time off work to build a family.

During a recent interview with The Mirror, the English actress - who's currently enjoying a high profile stint on Broadway -  confirmed that she hopes for children with husband of three years Marcus.

She said: 'I don't think you can ever be worried about your career when it comes to stuff like that. You've got to have some perspective.' 

Gentleman: Marcus took responsibility for the bags, which he stowed in the basket on the bike

Gentleman: Marcus took responsibility for the bags, which he stowed in the basket on the bike

Close couple: The pair have been married for three years and recently confirmed that they hope for children

Close couple: The pair have been married for three years and recently confirmed that they hope for children

Mulligan and Mumford were childhood pen pals who reportedly reconnected through moviestar and mutual friend Jake Gyllenhaal.

Her first movie role came 10 years ago with a memorable role in Pride & Prejudice, though Carey says that she's excited about the next period in her acting career. 

'I spent a lot of my early 20s playing teenagers because of my baby face,' she continued in the recent interview.

'My agent has started saying, "You've been offered this part, she's 19, you're too old", and I'm like, "I'm too old? Brilliant! I've never been too old". All the great parts come now, I think, so I'm excited.'

Down to earth: The high profile pair proved that they can live quite inconspicuously in the city

Down to earth: The high profile pair proved that they can live quite inconspicuously in the city

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