Taylor Swift has led the celebrity reactions to Selena Gomez's engagement news.

The Only Murders in the Building star revealed on Instagram on Wednesday that she is engaged to marry music producer Benny Blanco after a year and a half of dating.

Shake It Off star Taylor, who has been close friends with Selena for 15 years, reacted to the news by jokingly volunteering herself for a role in their wedding.

"Yes I will be the flower girl," she wrote in the comments.

Selena was inundated with congratulatory messages from fellow celebrities, such as her Spring Breakers co-star Ashley Benson, who posted, "Congrats lovey. So happy for you," with a series of heart emojis.

Jennifer Aniston commented, "HONEY!! Congratulations sweet mama!" while Gwyneth Paltrow simply wrote, "SELENAAAAAAA" and Lily Collins added, "Ahhhhhhhh yes yes yes!! Best news ever. Couldn't be more happy for you both."

Meanwhile, rapper Cardi B seemingly expressed her surprise by posting shocked and heart emojis alongside the comment, "Waiiiitttt hold on."

The 32-year-old also received messages from Olivia Wilde, Nina Dobrev, Suki Waterhouse and her Emilia Pérez co-star Karla Sofía Gascón, among others.

Selena announced her engagement by posting photos of her wearing her large diamond ring. She captioned the post, "Forever begins now.."

It has been an unforgettable week for the star as she also received two nominations at the Golden Globes for her performances in Emilia Pérez and Only Murders in the Building on Monday.

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