Timothée Chalamet ignored girlfriend Kylie Jenner 's 28th birthday on social media, instead sharing a bizarre boxing post that has fans fearing they've secretly split, RadarOnline.com can reveal.

The handsome actor, 29, was active on his Instagram while Jenner was celebrating her birthday with her family and friends at a party hosted by the makeup mogul's sister, Kendall Jenner on Sunday, August 10. Article continues below advertisement

Kylie Jenner's Birthday Weekend

The A Complete Unknown star posted the iconic photo of Muhammad Ali knocking out Sonny Liston to win the world heavyweight boxing title in 1965. Over it, he wrote "Dream Big" in sloppy lettering.

Chalamet had a good excuse for not being there in person for Kylie's big day, as he's in Hungary shooting the thi

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