Here's Sonali with one of the costumes up for grabs in a big film auction that's being held on Tuesday. Film fans with cash to splash will be bidding to get their hands on the famous threads. This costume was worn in the 1980s film called Supergirl.
Sonali even got to try on some of the clothes! Here she is wearing a tiny outfit worn by Victoria Beckham in the film she made when she was in the Spice Girls, called Spiceworld.
And here's Sonali again, this time in a Harry Potter costume. It was worn by the Quidditch teacher Madam Hooch in the films.
And some of Potter character Sirius Black's clothes are also up for grabs. They are one of the 400 auction lots which will go under the hammer.
This jacket has appeared in James Bond films - in fact it's one of the spy's most expensive coats. But it looks a bit big for Sonali!