The 32-year-old singer confirmed the news on Monday!
The couple started dating in February 2017.
A star was born when Charlie walked onto that movie set.
Looks like Cooper has discovered another star, who is also his best friend.
The superstar trifecta follows last year's co-chairs, Amal Clooney, Rihanna and Donatella Versace.
ET spoke with the 37-year-old 'Chicago Fire' star at the Carousel of Hope Ball on Saturday.
The 'Chicago Fire' star can't stop gushing about his ex, who has garnered critical acclaim for her role in the hit film.
ET celebrates how Mother Monster came to be!
Gaga also praised 'A Star Is Born' co-star Bradley Cooper during a Thursday appearance on 'The Late Show with Stephen Colbert.'
The outspoken advocate opened up about the recently hearings about Dr. Ford and Judge Brett Kavanaugh.
The 32-year-old popped into a movie theater in New York City to surprise fans at an advance screening of her new movie.
A star was born nearly 20 years ago with an uncredited role on 'The Sopranos.'
Cooper makes his directorial debut with 'A Star Is Born' but ET is throwing it back to when the actor was just "rising star" status.
'I would not be here without you,' she told the crowd.
