Their on-screen characters have an on-off relationship, and she's left him several times over lovers' tiffs.
But in real life Blake Lively's romance with Penn Badgley couldn't be more solid.
Arms wrapped round each other, the beautiful Gossip Girl couple were the centre of attention at a fundraiser in New York.
Onlookers couldn't help but note the spark between them, with Penn looking proud at his girl's fabulous appearance in a Victoria Beckham mini-dress and Christian Louboutin heels.
With the new season of teen drama under way, the fledgling style icon's sartorial choices have been in the spotlight recently.
Luckily the 22-year-old has been keeping up her reputation with a series of ultra-chic sexy outfits during shooting.
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