EXCLUSIVE: Kate Hudson Reveals Her 'Meaningful' Mother's Day Gift for Mom Goldie Hawn

Mother's Day is around the corner and Kate Hudson knows what she's getting for her mom, Goldie Hawn: "A letter."

"Mom likes [sentimental], meaningful things," Hudson explained to ET at a screening of her new film, Mother's Day, at the Metrograph theater in New York City on Thursday.

WATCH: Goldie Hawn Shares the Cutest Baby Photo of Daughter Kate Hudson on Her 37th Birthday

"Really, just all of us being together makes all of us happy," Hudson added.

Before Mother's Day (the holiday, not the movie) rolls around on May 8, Hudson will be attending this year's luxurious Met Gala, taking place Monday.

The 37-year-old Oscar winner revealed that she's still deciding between two different outfits to wear for one of fashion's most important events of the year.

While she couldn't give any hints as to who she'd be wearing, she admitted she was excited for the big day, and teased that whatever she chose to wear would likely be "not subtle."

WATCH: Kate Hudson Got Sexy, Shirtless Male Dancers as Her 37th Birthday Present

Hudson also addressed the theme for this year's Met Gala -- "Manus x Machina: Fashion in an Age of Technology" -- calling it "an interesting, fun theme."

Taylor Swift is set to co-chair this year's black tie event and Hudson had nothing but praise for the 1989 singer. "She's the best," Hudson gushed. "She's great at that kind of thing, she'll be awesome."

Mother's Day opens in theaters on Friday.

WATCH: Kate Hudson Recounts Her 'Emotional' Reunion With Garry Marshall for 'Mother's Day'

EXCLUSIVE: Kate Hudson on Her 'Emotional' Reunion With Garry Marshall for 'Mother's Day'

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