Question: how old are pearson triplets?
Answer: Kevin Pearson (born August 31, 1980), portrayed by Justin Hartley (current day), Logan Shroyer (age 15—17), and Parker Bates (ages 8—10), is Jack and Rebecca's son, and Kate and Randall's brother. He is "Number One" of the "Big Three", being the first of the surviving triplets to be born.