Mckenna Grace and Mason Thames star as love interests in Regretting You, but fans are just as obsessed with their off-screen romance, sparked by a viral TikTok kiss.

That’s not the only instance where fans have suspected that Thames and Grace are more than friends. Earlier this summer, when Thames was promoting How to Train Your Dragon, Grace accompanied him on a stroll around New York City. They held hands while being photographed.

Regretting You centers on “Morgan Grant ( Allison Williams) and her daughter Clara ( Grace) as they explore what’s left behind after a devastating accident reveals a shocking betrayal and forces them to confront family secrets, redefine love, and rediscover each other.”