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Sydney Sweeney ain't telling any pretty little lies with her lips in these pics ... passionately kissing her man Scooter Braun during a romantic Central Park outing in NYC.

The actress and the music exec posted up on a rock sitting above a pond in the center of the Big Apple Tuesday, bundled up against the cold in thick clothes ... but, the heat between them certainly seemed to keep them warm.

The pair later strolled through the park together ... while a bodyguard followed behind them, in case anyone got any funny ideas of messing with the celebrity couple. Play video content

We've seen Sydney and Scooter spending tons of time together in recent weeks ... though this is the first time we've seen them lock lips in public like this.

The two have grabbed dinner ,

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