Ariana Grande is keeping a major secret from her older brother, Frankie.

The starlet, 21, shared via Twitter that her grandfather passed away Tuesday. She had been sharing her thoughts about the tough time for several weeks now.

In a twist, she’s agreed, along with the rest of the family, to keep the news from her older brother, who’s currently participating in the latest season of “Big Brother.”

“Asked grandps last week if he wanted us to pull frankie off bb & he said ‘no way! he’s gotta play the game even tho i don’t understand it,’” read the tweet.

According to TMZ, Frankie is unaware of the news per the show’s live feeds.

It’s unclear how the show’s producers will handle the situation.