The reality star lets her hair down

After showing off her post-baby body in recent weeks, Kim Kardashian opted for a far less glamorous look yesterday.

The reality star donned comedy glasses and a grey moustache for a fun family dinner celebrating her stepfather Bruce Jenner‘s 64th birthday, where she enjoyed having a laugh with her loved ones.

Kim, 33, wore her blonde locks loose around her shoulders and looked casual and chic in a plain grey T-shirt.

The new mum wasn’t the only one playing dress up – her sisters also put on funny mini hats and larked about in family photos.

Silly sisters @kendalljenner #BrucesBirthdayDinner,’ Khloé, 29, posted on Instagram with cute snaps of her and Kendall Jenner messing around.

Youngest sister Kylie Jenner, 16, also enjoyed the get-together and posed with Kim and Khloé for a picture.

❤ Dinner with these beauts,’ she captioned an Instagram photo of the trio.

And even though they recently announced their split, Kris Jenner was happy to join Bruce at the dinner and loved dressing up with the family.

Just another family Sunday night dinner!! @khloekardashian @leah_jenner @sprandoni #love2besilly,’ Kris, 57, told her followers.

It’s not known if Kim’s boyfriend Kanye West, 36, or their four-month-old daughter North joined the fun gathering.

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Anna Francis