Kourtney Kardashian, Travis Barker Engaged: See Details About The Engagement

Kourtney Kardashian is engaged to Travis Barker after less than a year of dating, multiple outlets have confirmed.

The Blink-182 drummer, 45, got on bended knee at the Rosewood Miramar Hotel in Montecito, California, Sunday, TMZ first reported. A video and photos shared by the outlet showed Kardashian embracing and kissing Barker after saying yes to his proposal and revealed the elaborate floral arrangement the musician had laid out on the sand.

Her sister Khloe Kardashian and Tristan Thompson were present during the proposal, E! News reported.

"Kourtney looked very surprised to see Khloe and Tristan there," an unnamed source told E! News. "Travis escorted Kourtney down to the beach, where he had red and white florals set up in the shape of a heart. It looked very romantic. I could see Kourtney smiling from ear to ear and put her hand over her mouth looking surprised. The family cheered for them and went back into the hotel."

Another source told E! News that Kim Kardashian, Kris Jenner and Corey Gamble also witnessed the proposal and that "they surprised [the couple] afterward inside the hotel." The group then celebrated in a private area in the hotel's restaurant.

The newly engaged reality star revealed the happy news to her fans via Instagram, sharing photos of her and Barker embracing during the magical moment. "Forever @travisbarker," Kourtney wrote in the caption.

In the snaps, they are surrounded by red roses and candles that were set up in the shape of a heart at the beachside hotel. Kardashian, 42, sported a backless black gown, while Barker wore a black and white striped T-shirt and dark jeans.

In the comments, Barker responded, "Forever," adding an infinity emoji.

Kim also commented with ring and red heart emojis, while the official Instagram account of Poosh, Kourtney's lifestyle brand, congratulated the couple.

Kardashian and Barker went Instagram official in February, but the two were friends long before they started dating.

When the reports of their romance first made headlines in January, a source told Us Weekly that they had been dating for a "couple of months" already and that the musician is "very smitten" with Kardashian and has been for a while.

"They live on the same block and things are super easy between them because they know each other so well and just click and get one another. Her kids and his kids get along so well too, which is a major plus for both of them," another source told Entertainment Tonight at the time.

Barker was previously married to Melissa Kennedy from 2001 to 2002 and Shanna Moakler from 2004 to 2008. He shares stepdaughter Atiana, 22, son Landon, 17, and daughter Alabama, 15, with Moakler.

Meanwhile, Kardashian was in an on-again, off-again relationship with Scott Disick before they called it quits in 2015. The former couple shares three children together: Mason, 11, Penelope, 9, and Reign, 6.