'Bachelor' star Colton Underwood surprises unsuspecting super-fans

By Tony Morrison

It was an epic surprise of BACHELOR proportions!

"The Bachelor" star Colton Underwood is the ultimate party crasher, surprising super-fans of the show at a watch party on Monday, hosted by our very own Ginger Zee.

Colton Underwood surprises Bachelor fans at a "Good Morning America" viewing party.

Colton Underwood surprises Bachelor fans at a "Good Morning America" viewing party.

What better way to celebrate both "National Drink Wine Day" and "Bachelor Monday" than with the Bachelor himself?

Today is National Drink Wine Day. Today is also a Bachelor Monday.

Coincidence? I think not.

— Colton Underwood (@colton) February 18, 2019

Just a few minutes into Monday night's episode, party-goers got the surprise of their lives when Colton walked in with a bouquet of bright red roses. There were peels of laughter and piercing screams after he said, "Will you accept these roses?!"

.@Ginger_Zee and her #BachelorNation friends got an EPIC surprise last night when @BachelorABC’s @colton, @viallnicholas28, @ttolbert05, @jason_mesnick crashed their viewing party. https://t.co/W1vUNMab63 pic.twitter.com/ULsjXjQwc4

— Good Morning America (@GMA) February 19, 2019

Here's the moment Colton surprised the room:

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A post shared by Good Morning America (@goodmorningamerica) on Feb 19, 2019 at 6:59am PST

But wait, there's more! Unknown to even Ginger, Colton had a few friends tag along from the Bachelor universe: "The Bachelor" season 21's Nick Viall, "Bachelor in Paradise" season two's Tanner Tolbert and "The Bachelor" season 13's Jason Mesnick.

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One Bachelor, two Bachelor, three Bachelor, FOUR! SURPRISE! Brought a little bit of #BachelorNation to @ginger_zee’s @bachelorabc watch party last night! GMA Producers @farynjoy @dbrizz_1 @cleopatraja know how to plan a party let me tell you. #TheBachelor

A post shared by Anthony Morrison (@thetonymorrison) on Feb 19, 2019 at 7:08am PST

The whole night was best summarized by Ginger in just four words, "BEST. BACHELOR. SURPRISE. EVER."

Best. Bachelor. Surprise. Ever. https://t.co/kj7ArNAuJZ

— Ginger Zee (@Ginger_Zee) February 19, 2019

The Bachelor gang of four also had a little fun of their own at the viewing party. Tanner even got a little fence-jumping 101 from Colton:

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A post shared by Tanner Tolbert (@tanner.tolbert) on Feb 18, 2019 at 4:52pm PST

Meanwhile, Nick posted to Instagram, "just in case Colton quits ... they brought stand-ins."

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A post shared by Nick Viall (@nickviall) on Feb 18, 2019 at 4:43pm PST

We also learned Nick is great with kids:

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A post shared by ginger_zee (@ginger_zee) on Feb 18, 2019 at 4:15pm PST

On walking into a viewing party filled with unsuspecting Bachelor super-fans, "It was a little intimidating," Underwood told "GMA." "But I knew back up and reinforcements were coming."

Colton Underwood surprises Bachelor fans at a "Good Morning America" viewing party.

Colton Underwood surprises Bachelor fans at a "Good Morning America" viewing party.

The guys also shed some light on what to expect on next week's "Hometown Dates" episode of "The Bachelor."

"Home-towns is tough," Viall said. "It's very personal; you're bringing in people you didn't necessarily sign up for it."

Asked about who he is giving the final rose to? The Bachelor's lips are sealed.

.@colton's lips are sealed!! https://t.co/encV5dofdM pic.twitter.com/OL7FaVdnhs

— Good Morning America (@GMA) February 19, 2019

"The Bachelor" airs Monday nights at 8 p.m. ET on ABC.