httpss://www.youtube.com/watch?v=98CtvqiNfOo

EXCLUSIVE. We know who the biter is in the Beyonce mystery … we’re told it’s none other than Sanaa Lathan.

Multiple sources tell TMZ, Tiffany Haddish has told multiple people the culprit is Sanaa.

One source said it was not an aggressive bite … it was playful and noninvasive, but still caught Beyonce off guard.

Sanaa tweeted a faint denial, saying “Y’all are funny. Under no circumstances did I bite Beyonce and if I did it would’ve have been a love bite.”

The story goes … Sanaa was talking to Jay in a way that made Bey uncomfortable.

Beyonce went over to Sanaa who brushed off any insinuation of inappropriate conduct and then gave her a jokey bite.

Tiffany told Beyonce she was going to kick Sanaa’s ass, but Bey told her to let it go.