PIX: Sushmita, Amitabh, Hrithik party with Vashu Bhagnani

So how do Bollywood stars party? Here's a look.

Producer Vashu Bhagnani -- who started off his movie career with Coolie No 1, Hero No 1, and made films right up to the recent Himmatwala -- has produced 25 Hindi movies so far. He celebrated the big landmark in his life with a lavish party on Saturday, March 22, at a suburban five star hotel.

Among the first ones to arrive was Sushmita Sen, who worked with Bhagnani in the hit, Biwi No 1.

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Amitabh Bachchan, who worked with Vashu Bhagnani in Bade Miyan Chote Miyan, gave a speech at the event while wife Jaya and son Abhishek looked on.

Vashu Bhagnani poses for pictures with wife Puja, his actor son Jackky and daughter Honey.

The father-son duo have worked in films like FALTU and Rangrezz, and the upcoming Youngistaan.

Honey is married to Riteish Deshmukh's brother Dheeraj.

Himmatwala actress Tamannah smiles for the shutterbugs.

Dia Mirza, who made her movie debut in Bhagnani's Rehna Hai Tere Dil Mein, arrived with beau Sahil Sangha.

Riteish Deshmukh arrived with wife Genelia D’Souza.

One of Riteish's earliest movies Out Of Control was produced by Bhagnani, and they went on to do many more together.

In fact, the actor tweeted: '25 films in 20 years - thank you Vashuji for making me a part of six of them. Looking forward to doing many more. Congrats sir.'

Hrithik Roshan was dressed casually for the do.

Esha Gupta, who stars in Bhagnani's upcoming film Humshakals, strikes a pose.

Sophie Choudhry makes her presence felt in a bright blue number.

Neha Sharma looked chic in a slit black dress. The actress will be seen in Bhagnani’s Youngistaan, which releases this week. 

Celebrity couple Arshad Warsi and Maria Goretti arrive.

Sajid Khan, who is presently directing Humshakals, was accompanied by veteran actor Randhir Kapoor.

Randhir had worked in Sajid's earlier film Houseful 2.

Raveena Tandon arrives with husband Anil Thadani.

Composer Anu Malik arrives with his wife, Anju.

Composer Himesh Reshammiya was accompanied by his wife Komal.

Veteran actors Annu Kapoor and Shakti Kapoor arrive. 

Directors Anubhav Sinha and Satish Kaushik were also spotted. 

David Dhawan has directed six movies with Bhagnani, including the No 1 hit series.

Anupam Kher poses with writer/director Rumi Jaffery.

Music composers Sajid-Wajid arrive.

Tips owners Ramesh and Kumar Taurani were also spotted.

Choreographer Remo Fernandez and Shilpa Shetty's husband Raj Kundra were also spotted.