They've become quite the posse. Barack Obama, Bill Clinton and George Bush, the ex-president crew that have been seen golfing together and promising Harvey relief with no Trump in sight, are set to continue their benevolent bromance with a headline appearance at a Texas benefit concert.

The George H.W. Bush Presidential Library Foundation announced the trio's upcoming appearance at the "Deep From The Heart" event Wednesday. The benefit concert will take place on Oct. 21 at Texas A&M University's Reed Arena and will feature all three of the ex-presidents, plus Bush senior and Jimmy Carter.

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Other performers include Lee Greenwood, The Gatlin Brothers, and Lyle Lovett, but the big five are billed as headliners. Proceeds go directly to victims of the major hurricanes that have struck the region in recent weeks.

The five men launched their joint One America Appeal last month, with all proceeds going to various charities via the George H.W. Bush Presidential Library Foundation.

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Trump's done his part for hurricane relief in recent days too, visiting Puerto Rico to throw paper towels into the crowd.