Ariana Grande's brother Frankie Grande approves of her boyfriend Ethan Slater.

"I love him, he's a very sweet guy," the dancer said in a new interview with TooFab. "I've been a fan of him ever since I saw him in Spongebob [the musical]. And I got to interview him when I was doing the Spongebob Square Pants podcast. And the Broadway community is a close family."

But Frankie had even more admiration for Slater. "He's a great person. Ethan is a great guy," he continued. "He's so sweet. He is very very very sweet. I just, I adore him. I, honestly, I have always said this, all I want is my sister to be happy, and when she is happy, I am happy. So I am very happy.

Ariana and Slater met on the set of the movie Wicked, while both were still married to their former partners. It is unclear when they started dating, but their romance is believed to have blossomed a few months after Ariana and Dalton Gomez broke up.

As for Slater and his wife Lily Jay, sources also claimed they were separated when he and Ariana were involved, while another source claimed they were separated because of Jay's confusing timeline and because the Spongebob actor and his wife welcomed their first child just a few months ago. The beginning of the relationship was mired in controversy.

Despite its rocky beginnings, their relationship appears to be getting stronger and 2 people reportedly moved in together last fall.

As for Frankie, we already had an idea of his feelings for Slater, he reportedly told Ariana, Slater, and a source at the time, "All her friends love him."