EXCLUSIVE: 'This Is Us' Star Chrissy Metz Blushes Over Her Real-Life Romance: He's 'My Sweet Treat'

The 36-year-old star opens up to ET about her four-month relationship.

This Is Us star Chrissy Metz is in love!

The 36-year-old actress exclusively opened up to ET's Katie Krause about her real-life romance, and she already has plans to celebrate the holidays with her new man.

WATCH: Chrissy Metz Calls 'This Is Us' Contractual Weight-Loss Rumors 'Weird,' Teases Winter Finale

“He’s not an actor, but he is a sweet treat and he’s wonderful,” Metz adorably revealed to ET at 102.7 KIIS-FM’s Jingle Ball 2016 at Staples Center in Los Angeles on Friday. “It’s new, but I will be kissing him under the mistletoe.”

Though Metz did not reveal who her boyfriend of four months is (only that he works in the industry behind the scenes), she said that the relationship is in the early stages and that things are looking promising.

“[We met] through a friend,” Metz said, adding that they met “at the beginning” of This Is Us.

When asked if she believed she was in love, Metz took a beat before telling ET, “You know what? I think I am. It’s such a blessing -- really it is. It really is.”

RELATED: Chrissy Metz Talks About Possibility of Losing Weight Fast for 'This Is Us' Role

Metz explained why she was cautious speaking about her relationship.

“Here’s the thing, like, he needs to have his own life,” she said. “I don’t want him roped into mine, so I just want to protect him. My little sweet treat.”

In November, Metz was candid about her This Is Us character, Kate; her desire to shed weight; and how it’s affected her life off the show. According to an interview with TVLine, she said she had to agree to lose weight in real life.

"In our contract, it did state that that would be a part of it, to lose the weight in the trajectory of the character as she comes to find herself," Metz said. "That was a win-win for me. Because it’s one thing to try to do it on your own. But as human beings, it’s an ego thing: We’re more likely to do something for someone else."

RELATED: 'This Is Us' Star Chrissy Metz Dishes on Why the Jack Revelation Was 'Overwhelming'

Metz responded to interest surrounding her candid discussion over her character's weight loss journey and the real-life parallels, telling ET it's a topic that's still not talked about enough.

"I think it's still weird for people to be like, 'Oh she's the big girl, oh she's on network television.' I think that's still really new for them and I think it's an education and the more that we see people who are average or plus size, we're like, 'Oh it's not scary, it's not a weird thing.' I think they just want to talk about it because it's not talked about a lot."

Earlier this year, Metz spoke to ET about why her character resonates with so many viewers.

“I think everyone has shame about something, whether it’s a lack of a relationship with a child or maybe their weight or a lack of communication within their marriage,” she said. “Everyone can relate to that because we all have something that we’re like, ‘God, I can work on that or I wish I was better at doing this.’”

This Is Us
airs Tuesdays at 9 p.m. ET/PT on NBC.