Hilary Duff is one VERY yummy mummy as she cuts a lean figure in leather at Hollywood bash

By Iona Kirby

PUBLISHED: 11:30 EST, 26 August 2012 | UPDATED: 11:30 EST, 26 August 2012

She has been working hard to shift her baby weight and after losing the excess pounds, Hilary Duff is now happy to show off the fruits of her labour.

The 24-year-old star stole the spotlight at a Hollywood event last night when she displayed her post baby body in skin-tight leather trousers.

She looked noticeably slimmer and certainly seemed to be feeling body confident in her sexy bottoms.

Hell for leather: Hilary Duff showed off her slim post baby body in leather trousers at a Hollywood party last night

Hell for leather: Hilary Duff showed off her slim post baby body in leather trousers at a Hollywood party last night

Hilary, who gave birth to her first child Luca five months ago, teamed the trousers with a two-tone black and beige top and a pair of metallic court shoes.

Before her night out Hilary enjoyed a relaxing day with her baby boy and the pair were seen browsing the farmers market.

She was in attendance at a party thrown to celebrate the launch of upcoming sitcom The Mindy Project.

Hot mama: Hilary teamed the trousers with a two tone top for the launch of The Mindy Project at Skybar

Hot mama: Hilary teamed the trousers with a two tone top for the launch of The Mindy Project at Skybar

Post break-up haircut?: John Mayer (R) has lo! pped off his locks since splitting from Katy Perry and he posed up with B.J. Novak

Post break-up haircut?: John Mayer (R) has lopped off his locks since splitting from Katy Perry and he posed up with B.J. Novak

A host of celebrities joined Mindy Kaling, who created and stars in the FOX show, at Skybar for the glamorous evening.

Also in attendance was singer John Mayer, who showed off a new haircut following his split from Katy Perry.

The star lopped off his trademark shaggy brunette locks and sported an unbuttoned plaid shirt over a grey T-shirt.

Brilliant in blue: Ali Larter posed for photos with Mindy Kaling, who created and stars in the upcoming show

Brilliant in blue: Ali Larter posed for photos with Mindy Kaling, who created and stars in the upcoming show

Showing their support: Angela Kinsey and Ellie Kemper were out in full force to help Mindy celebrate

Showing their support: Angela Kinsey and Ellie Kemper were out in full force to help Mindy celebrate

And Heroes actress Ali Larter looked pretty in a tiered blue strapless dress as she posed up with Mindy at the star-studded event.

Angela Kinsey, Ellie Kemper, B.J. Novak and Ed Weeks were also out in full force to celebrate the new show.

The Mindy Project, which airs on September 25, follows a single physician as she navigates her life personally and professionally.

Star-studded: Mindy enjoyed a drink as she chatted to fellow actor Aziz Ansari

Star-studded: Mindy enjoyed a drink as she cha! tted to f! ellow actor Aziz Ansari