Sienna Miller, 41, cosies up to boyfriend Oli Green, 27, as they join ... trends now

New parents Sienna Miller and Oli Green joined Lila Moss at a star-studded bash hosted by denim brand Frame at Caviar Kaspia in Paris amid the city's Fashion Week on Sunday.

The actress, 42, who welcomed a baby girl with the hunk, 27, just two months ago, nailed casual chic in a long leather trench. 

Sienna layered her coat over a pair of high-waisted jeans and plunging top while styling her luscious blonde locks in loose waves.

Meanwhile Oli opted for a suede jacket and jeans as he loving wrapped his arm around his girlfriend. 

Kate Moss' model daughter Lila, 21, also opted for leather and wrapped up in a  coat which she belted at her tiny waist. 

Sienna and Oli were pictured with their newborn in January as they made a stylish outing to a coffee shop in west London in a khaki coat and denim jumpsuit with a £3,300 designer Artipoppe baby carrier strapped to her.

The actress already has daughter Marlowe, 10, from her previous relationship with actor Tom Sturridge, 38. 

Sienna's pregnancy was revealed during a beach holiday in August where she stepped out sporting a bump. 

In December Sienna covered Vogue as she spoke for the first time about her pregnancy and revealed she was having a girl.

In incredible photos taken to accompany the interview she displayed her bare bump alongside both Marlowe and boyfriend Oli.

Sienna spoke candidly about her pregnancy and how it had been 'unplanned', but admitted she feels 'more psychologically prepared' than with her first born.

During the rare interview, Sienna said that Marlowe has been angling for a sibling for some time.

Sienna also said she'd been fighting her own prejudices about being an older mother and has to learn to stop making a

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