Kaley Cuoco and Henry Cavill
07/12/2013 at 09:05 AM EDT
Faster than a speeding bullet … it's over.
Superman Henry Cavill and The Big Bang Theory
's Kaley Cuoco have broken up, just days after the news broke
of their relationship.
A source confirms the split to PEOPLE, but no reason was given.
As it was, Cavill, 30, who stars in Man of Steel
, and Cuoco, 27, had only been in what had been described as the "beginning stages" of coupledom.
They had been spotted earlier this month hiking
together, followed by a stop for sushi near Cuoco's Sherman Oaks, Calif., home. Days later they snuck in some PDA while getting groceries in Los Angeles.
was the first to report the split.
– Elizabeth Leonard