'This is Us' Sterling K. Brown We're About to Find Out How Jack Dies

3/23/2017 10:00 AM PDT

'This is Us' Star Sterling K. Brown Promises When We'll Know How Jack Dies

EXCLUSIVE

"This is Us" star Sterling K. Brown has some reassurance for fans ... they're about to find out what kills Jack.

The actor who plays Randall was leaving LAX Thursday when our photog begged for some sort of answer. Sterling said way more than Mandy Moore when we got her last week at the same place.

Finally.