Zayn Malik, Gigi Hadid In Case there Was Any Doubt ...

11/29/2015 6:47 AM PST

Zayn Malik and Gigi Hadid got all handsy with each other Saturday night, proving their relationship with clear and convincing evidence.

Zayn and Gigi left their favorite night spot -- The Nice Guy in WeHo at around 2:30 AM -- holding hands.

It's sort of a right of passage ... first going through back doors, then walking in separately, but eventually interlocking fingers.