With a Little Help From Cher, Colton Haynes Gets Engaged to BF

This might be the most fabulous wedding proposal ever.

Actor Colton Haynes, who revealed his relationship to celebrity florist Jeff Leatham last month, announced on Instagram he's engaged.

The "Arrow" star posted a photo Saturday night, showing himself kissing Leatham in front of fireworks on a beach while vacationing in Los Cabos, Mexico, USA Today reports. But his caption revealed a lot more: "I SAID YES!!!!" he wrote.

The romantic setting might have seemed perfect enough but Leatham went the extra mile, recruiting none other than Cher to help with his proposal to Haynes, 28. A video display setup at the proposal spot shows Cher on screen singing, "I Got You Babe."

Leatham shared the video message from Cher on his account where she says, "This is for you, you know what it is, you know what you're supposed to do now. And this is going to be the best thing ever - and you have to call me to tell me how it worked out, all right?"

"Thank you Cher... for helping me make my proposal evening epic," the celeb florist wrote in the caption. "I got you babe never sounded so good right before Colton Haynes said 'YES!!!!' So appreciated and much love."

Haynes also thanked Cher on his Instagram, writing the singer "sounded incredible as always. The most special night of my life."

Leatham getting Cher to help out with his proposal shouldn't come as a big surprise -- the celeb florist has made flower creations for A-listers, including Adele, Lady Gaga, Reese Witherspoon, Dolly Parton and more.

Check out the proposal pics and some of the couple's vacation pics below.