The actress also shared video showing a hairstylist taking scissors to her trademark blonde locks.
Cooper and Hadid's romance started in late 2023.
The couple was recently spotted in New York City together.
40 stars including Dua Lipa, Oprah Winfrey and more posed together for ‘British Vogue’ Editor Edward Enninful’s final cover.
A source close to ET says Bradley Cooper and Gigi Hadid bond over 'parenting, living in the public eye, humor, and more.'
The couple was recently spotted in London holding hands.
Bradley Cooper and Gigi Hadid hold hands during a London outing as a source tells ET, the couple is 'going strong.'
They appeared to be in good spirits while out and about in London.
Hadid and Zayn Malik's daughter celebrated her 3rd birthday in September.
Taylor Swift celebrates her 34th birthday with Blake Lively, Sabrina Carpenter, Gigi Hadid and more famous pals in New York City.
Swift's A-list besties shared birthday wishes for their friend on social media.
Cooper and Hadid were first linked romantically earlier this year.
She chowed down a bit and took some to go Wednesday morning in New York's Greenwich Village.
Gomez and Hadid are both happy for Swift and love how she's being treated.
