In the past month, rumors circulated that "To All The Boys I Loved Before" actor Noah Centineo is off the market after eyewitnesses spotted him packing on a lot of PDA with an Instagram model. 

It was unofficial back then, but now, he and his girlfriend just recently made their red carpet debut at the UNICEF Masquerade Ball. 

He is dating Alexis Ren, 22, and the two looked all cuddled up on the red carpet last Saturday. 

The 23-year-old star dressed down his look with a black blazer and a pair of sneakers and sunglasses, while his new beau was styled in a dazzling metallic halter dress with a thigh-high slit and matching silver pumps. 

The two have not posted about each other on their respective social media accounts during last night's events but the Alexis did share a few snaps on the model's Instagram Story of her makeup look for the ball. 

But they ~kind of~ made it Instagram official when the "Masters of the Universe" star posted on his Instagram Story Wednesday night a video of himself - boasting his newly-shaved head - sitting on a couch while jokingly scaring his new lady as she sits next to him while playing on her phone. 

Many said that it was the mark of the first time Noah has posted an image of Alexis on his Instagram.

Alexis, a "Dancing with the Stars" alumni, has been spotted around town getting cozy with the actor on multiple occasions. 

An anonymous source said that they have been seeing each other on the downlow as early as May 2019. 

The first one was at Palm Beach airport in Florida. According to a source of Us Weekly, "He picked her up as she was on my flight. He was waiting for her at baggage claim. He kissed her on the head and they were holding hands and hugging." 

The second outing, they were spotted on September 25th, where Us Weekly's other source saw the pair looking all sweet and in love while leaving a restaurant in West Hollywood. 

"He was with a group of five people: two girls and two guys, plus him. As he walked away, he wrapped his arm around Alexis and kissed the side of her forehead and kept her in a tight side0hug as they walked to the valet."

The same source said that they "looked pretty lovey" to me. 

Fans were mostly surprised by the news. 

"Alexis Ren and Noah Centineo are dating? Allegedly?"

"Noah Centineo and Alexis Ren? Not sure how I feel about that." 

The last indication that they were already dating was Alexis' Instagram photo with Noah cupping her face, though he was not seen, it was assumed that it was him. 

The "Sports Illustrated" model posted another photo, though without caption, a screenshot of sweet text messages. The conversation with presumably Noah. 

Alexis is no stranger to the spotlight. She previously dated her DWTS partner, Alan Bersten. The two didn't go beyond the dance flow, unfortunately. They have split right after the show ended.