Matthew McConaughey & Son Levi are Twinning!!

Matthew McConaughey is already teaching his son, Levi, how you just gotta keep livin' man, L-I-V-I-N ... the healthy way.

The two went for a mile run while on vacation in Honolulu, where the elder McConaughey was promoting the military's "Rock the Troops" concert over the weekend.

Levi, who's 8, barely broke a sweat, but can't say the same for Matt. He just keeps getting older, but the ...