PIX: Aamir, Sonam, Alia at Karan Johar's birthday bash

The director-producer turned 42 on May 25.

Several Bollywood stars turned up at Karan Johar's plush new home in Bandra, a western Mumbai suburb, over the weekend to celebrate his birthday.

Aamir Khan and Kiran Rao were in their element, and in colour coordinated grey outfits, as they arrived at the star studded bash.

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Back from a successful stint at the recently concluded Cannes film festival, actress Sonam Kapoor couldn't hep but push sarotial boundaries at home turf too.

While most stars were decidedly dressed down, Sonam was more dressed up in a Bibhu Mohapatra gown and Louboutin sandals.

Maybe she needs a stylist who routinely reminds her to dial it down a bit every once in a while.

Before she flew off to New York to start her filmmaking course, Queen actress Kangna Ranaut made sure to attend KJo's birthday bash and wish him.

Kangna, often hailed as Sonam's rival given her knack for picking out trendsetting looks, was more appropriately dressed in her beaded blouse and Burberry skirt.

Looks like Parineeti Chopra took Alia Bhatt's fashion advice a little to seriously.

The bubbly actress opted for an electric blue romper for the occasion and paired it with a printed jacket with neon accents.

Meanwhile, known to dole out unsolicited fashion advice and be caught in awkward situations when asked questions about the country's politicians, Alia Bhatt played it safe in Zara separates.

To her credit though, she looked lovely.

Sonali Bendre, flanked by husband Goldie Behl and Hrithik Roshan, ahead of the bash.

The actress's sheath, although quite lovely with its print and colours, was quite distracting, thanks to the awkward hemline.

Quelling all pregnancy rumours, actress Vidya Balan partially bared her midriff in a Manish Malhotra outfit, as she arrived with husband Siddharth Roy Kapur.

New couple Harman Baweja and Bipasha Basu arrived together for the bash.

Actor Aditya Roy Kapur arrives.

UTV head Ronnie Screwvala and his wife Zarina Mehta, photographed at the do.

Actor couple Riteish Deshmukh and Genelia D'Souza were also spotted.

Riteish's younger brother Dheeraj and his wife Deepshikha welcomed a healthy baby boy on Sunday, May 25.

Main Tera Hero actor Varun Dhawan was also among the invited guests.

Actor siblings Saqib Saleem and Huma Qureshi pose for pictures.

Director Punit Malhotra and actor Rahul Khanna make their way to the big birthday bash.

Music compsoer duo Shekhar Ravjiani and Vishal Dadlani arrive.

Jackky Bhagnani and Dino Morea, spotted at the party.

Phantom director Kabir Khan was accompanied by television show host wife Mini Mathur.

Boman Irani's son Kayoze, who made his acting debut with KJo-directed Student of the Year, was also at the bash.

If his wide grin is any indication, Chunkey Pandey had a whale of a time at KJo's party.

Malaika Arora Khan shows off her hourglass figure in white cutout cropped top and pencil skirt combination.