'The Bachelorette': Aly Raisman's ex competing for Becca Kufrin's heart

One of the suitors competing for Becca Kufrin's love on the new season of "The Bachelorette" has already had one high-profile relationship in the past.

Though Colton Underwood made a great first impression on Monday night's season premiere of the ABC dating show, some fans noticed that he looked suspiciously familiar -- and that's because he used to date former Olympic gymnast Aly Raisman.

In fact, at least one fan "thought [Aly and Colton] were still together until I saw him on" the show. 

Noting that he has an affinity for dating women in the public eye, some fans questioned the 28-year-old's intentions of appearing on the show. 

"Dude is a famew--re," one person tweeted.

"Hey, it’s Colton. Mr Aly Raisman," RealitySteve, a "Bachelor" expert, tweeted. "Lets see how much increase he gets in his IG followers after this."

See photos of Colton and Aly together:

12 PHOTOS
Aly Raisman and Colton Underwood together
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Aly Raisman and Colton Underwood together
Colton Underwood (L) and Aly Raisman attend the Sports Illustrated Swimsuit 2017 launch event at Center415 Event Space on February 16, 2017 in New York City. / AFP / Angela Weiss (Photo credit should read ANGELA WEISS/AFP/Getty Images)
HOUSTON, TX - FEBRUARY 18: SI Swimsuit model Aly Raisman (R) and Colton Underwood attend the VIBES by Sports Illustrated Swimsuit 2017 launch festival on February 18, 2017 in Houston, Texas. (Photo by Rick Kern/Getty Images for Sports Illustrated)
HOUSTON, TX - FEBRUARY 17: SI Swimsuit model Aly Raisman, right, and Colton Underwood at the VIBES by Sports Illustrated Swimsuit 2017 launch festial on February 17, 2017 in Houston, Texas. (Photo by Bob Levey/Getty Images for Sports Illustrated)
LOS ANGELES, CA - JANUARY 10: Colton Underwood (L) and Aly Raisman attend a basketball game between the Portland Trail Blazers and the Los Angeles Lakers at Staples Center on January 10, 2017 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
LOS ANGELES, CA - JANUARY 10: Colton Underwood (L) and Aly Raisman attend a basketball game between the Portland Trail Blazers and the Los Angeles Lakers at Staples Center on January 10, 2017 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
BEVERLY HILLS, CA - JANUARY 08: NFL player Colton Underwood (L) and Olympic Gymnast Aly Raisman arrives at the NBCUniversal's 74th Annual Golden Globes After Party at The Beverly Hilton Hotel on January 8, 2017 in Beverly Hills, California. (Photo by Greg Doherty/Getty Images)
LOS ANGELES, CA - JANUARY 08: Aly Raisman (R) and Colton Underwood arrive at HBO's Official Golden Globe Awards after party at the Circa 55 Restaurant on January 8, 2017 in Los Angeles, California. (Photo by David Livingston/Getty Images)
BEVERLY HILLS, CA - JANUARY 08: Football player Colton Underwood and gymnast Aly Raisman attend the 74th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 8, 2017 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - JANUARY 07: Aly Raisman and Colton Underwood arrive at the Gold Meets Golden event held at Equinox on January 7, 2017 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - JANUARY 07: Colton Underwood and Aly Raisman attend the Gold Meets Golden event on January 7, 2017 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
NEW YORK, NY - DECEMBER 12: Colton Underwood (L) and Aly Raisman attend the 2016 Sports Illustrated Sportsperson of the Year at Barclays Center of Brooklyn on December 12, 2016 in the Brooklyn borough of New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - DECEMBER 12: NFL player Colton Underwood and Olympic gymnast Aly Raisman attend the 2016 Sports Illustrated Sportsperson of the Year at Barclays Center of Brooklyn on December 12, 2016 in the Brooklyn borough of New York City. (Photo by Gary Gershoff/WireImage)
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The former couple started dating in August of 2016 after Underwood's former Radiers teammate, Andrew East (who is married to fellow gymnast Shawn Johnson), set them up on a blind date. Underwood also made headlines when he asked Raisman out during a live interview that Raisman did around the same time.

They made their red carpet debut as a couple in December of that year and even appeared at that next January's Golden Globes together.

They continued to date until that summer, when Underwood revealed that he and Raisman had broken up.

"We’re taking a break right now. We’re still good friends and talk, but all that travel had been a nightmare," he told The Lincoln Journal Star in June of 2017. "It ended fine. We’re in a good place."

During the season premiere of "The Bachelorette," Underwood -- who is one of 28 men vying for Kufrin's heart -- opened up about his professional football past and why he's on the show in the first place.

"I sacrificed a lot of things including relationships for football," Underwood said on the show. "I don't know much about Becca, but I think that's probably the best way to go into this. I want to get to know her and I'm ready to put myself out there and find love and have somebody to share my life with, share my experiences with. I need a real person in my life. My dog's great, but it's not going to be the love of my life."

See all of Becca Kufrin's suitors on "The Bachelorette" below:

27 PHOTOS
'The Bachelorette': All of Becca Kufrin's suitors
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'The Bachelorette': All of Becca Kufrin's suitors

Lincoln

(Craig Sjodin/ABC via Getty Images)

Jean Blanc

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Jordan

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Jake

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Rickey

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Joe

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Blake

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Alex

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Garrett

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Leo

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Ryan

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David

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Chris R.

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Nick

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Clay

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Christian

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Colton

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Wills

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Mike

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Jason

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Darius

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Connor

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Grant

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Kamil

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Trent

(Craig Sjodin/ABC via Getty Images)

John

(Craig Sjodin/ABC via Getty Images)

Christon

(Craig Sjodin/ABC via Getty Images)

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