Zac Efron has promised to "make it up" to Paris Jackson after unknowingly breaking her heart when she was 10.
The 'Baywatch' actor was "bummed out" to hear about the 18-year-old actress' disappointment after she had been excitedly looking forward to him appearing at a 'High School Musical' live concert several years ago, only for him to miss the performance due to filming commitments.
He said: "I did not know this. This is the first time I'm hearing of it. I'm bummed out.
"I'll have to make it up to her. Absolutely. In some way. I'm sure we'll cross paths. Much love until then."
Paris revealed her "heartbreak" to talk show host Jimmy Fallon last week.
Discussing Zac's absence, she recalled: "It was the depressing part, I was this heartbroken 10 year old."
Meanwhile, though Zac, 29, worked out to be in incredible shape for the 'Baywatch' movie, he admits it isn't a workout regime he'll be sticking to now filming is over because he doesn't need to be "that buff" in everyday life.
He told 'Entertainment Tonight': "That was pretty intense shape. That involved training two, four, seven, six days a week, 4:30 in the morning - up everyday.
"I always maintain health and fitness for life. You know, I love to be able to do anything at all times and be strong, which is just a part of the way I live.
" You know, cutting water and that's essential to looking like an Olympic swimmer. That was to achieve a specific look, it's not functional.
"I don't need to be that buff to give interviews and stuff."
One scene in the film sees Zac don high-heeled shoes and he found it one of the trickiest things he'd ever filmed because the footwear was so uncomfortable.
He said: "It's so tough. I don't know how girls do it.
"You're not meant to walk like that. You're on your toes, it's really tiring on the legs.
"I remember at the end of the day, I was just like, I wanted to give up but I couldn't sit down because I would show something.
"The dress had a slit. I don't know how you girls do it. I give you so much props."
