The 43-year-old "Mortdecai" star has been saving her gowns since past 12 years, reported People magazine.
"What's funny is I've been saving my gowns and special things since 12 years before she was born, so I have everything. I have every Oscar dress," Paltrow said.
The collection also includes her famous pink Ralph Lauren dress, which the she wore while accepting her Best Actress Oscar for her role in "Shakespeare in Love".
"Maybe she'll wear it to prom and do a Pretty in Pink thing and resew it and cut it up," she said.