“The Flash” star Grant Gustin is engaged to his girlfriend, LA Thoma.

A source told Entertainment Weekly that the CW actor proposed to Thoma on Saturday, a day after she moved into his place in Venice, California on Friday. According to the source, Gustin got down on one knee with a ring in hand in the middle of their workout session on the beach.

Although Us Weekly reported that Gustin and Thoma started dating in January 2016, it’s possible that the two have known each other long before their romance began, as both of them had stayed in Virginia during their younger years. Gustin was born in Norfolk, Virginia. He attended the Governor's School for the Arts program in Norfolk and went to Hurrah Players Incorporated, which is a theater organization in the state. Meanwhile, Thoma worked as a student physical therapist in the Virginia area and in Connecticut for five months, before moving to California.

READ: Jesse L. Martin Teases Joe-Cecile Drama In Season 3, episode 20 of “The Flash”

Thomas graduated with a bachelor of science degree in exercise physiology from Kent State University in 2009. She then attended Old Dominion University to get her doctorate degree in physical therapy.

Gustin announced his engagement to Thoma with a photo on his Instagram page on Saturday. The picture doesn’t have any caption, but it has Thomas showing off the engagement ring she got from the actor.

Gustin and Thomas later shared the news with their close friend, Leela Rothenberg, via FaceTime. Rothenberg then took to Instagram to upload a screenshot of herself video-chatting with the soon-to-be bride and groom, with Thoma’s new ring  on full display.

Gustin’s “The Flash” co-stars also sent their congratulations to the newly-engaged couple. Candice Patton, who plays Gustin’s love interest Iris West on the TV series, commented on their photo writing, “Huge congrats!!” Andy Mientus, meanwhile, who has guest starred on “The Flash” as Hartley Rathaway, a.k.a. Pied Piper, wrote, “DUDE!!!!! IS THAT WHAT I THINK IT IS?!??”

“Supergirl” star Melissa Benoist, who has worked with Gustin on “Glee” and on crossovers events between CW’s DC TV shows, sent her congratulations as well. “YAYYY!!!!!” she commented.

Interestingly, Gustin’s real-life engagement happened just five weeks after his “The Flash” character, Barry, popped the big question to Iris for the second time on “The Flash.” At the end of “The Flash’s” musical crossover with “Supergirl” last March, Barry serenaded Iris with an original song before getting down on one knee again. Unlike his first proposal, Barry’s second proposal wasn’t an attempt to prevent Iris’ death at the hands of Savitar.

“It’s the proposal she dreamed of and knowing that it’s truly coming from a place of love and not a place of just trying to save her life, she’s thrilled. She’s over the moon,” Patton told TV Guide at PaleyFest last March. “She loves Barry and this is what she wants. She just wanted to make sure Barry felt the same way and had the right intentions.”

“Barry was kind of re-establishing his confidence in the relationship. Not letting his fear dictate things, but rather let his heart dictate things, which he’s always done in the past,” Gustin told Entertainment Tonight of why Barry decided to propose to Iris for the second time.

An all-new episode of “The Flash” (Season 3, episode 20) airs on Tuesday, May 2 at 8 p.m. EDT on The CW.