Hank Williams Jr., left, joins Chris Stapleton at Austin360 Amphitheater Aug. 13.

Aug. 13 is the date for one of the summer’s biggest country double bills, as lifelong star Hank Williams Jr. teams with current sensation Chris Stapleton at the Austin360 Amphitheater.

Tickets, $29.50-$99.50 (not including service charges), go on sale Jan. 29 via ticketmaster.com; full details are at the venue’s website.

Though Hank Jr. has by far the longer track record — he’s been releasing albums since he was a teen in the mid-1960s, rising in the shadow of his legendary father — Stapleton is the hotter property right now. After winning several of the Country Music Association awards last fall, he’s up for three Grammys next month, including Best Country Album and the overall Album of the Year honor for his 2015 breakthrough release “Traveller.”

Hank Jr. last week released “It’s About Time,” an album in which he mixes nostalgic tunes (“Those Days Are Gone”) and classic covers (Neil Young’s “Are You Ready for the Country”) with rabble-rousing right-wing anthems (“God and Guns,” “Club U.S.A.”).