Tom and Chet Hanks had a blast at the Dodger game on Monday ... belting out "Take Me Out to the Ballgame" together -- and TMZ Sports has the vid!!
The Oscar-winning actor and his "White Boy Summer" son had a box seat for L.A.'s 5-4 win over the St. Louis Cardinals ... and during the 7th inning stretch, the duo passionately joined in on the traditional tune.
Tom and his son looked as close as ever as they vibed out to the song ... with Chet wrapping his arm around his dad as the "Finch" star pumped his fists in excitement throughout the jingle.