Tom Selleck and Sam Elliott have a rock-solid friendship dating back decades, and now insiders say the 1883 star is hustling to reconnect with the Blue Bloods alum and snap him out of his current funk.

The 80-year-old Selleck has reportedly been down in the dumps since the 14-year run of his TV cops drama Blue Bloods, where he played Big Apple Police Commissioner Frank Reagan, ended in December, and Sam, 81, hopes to snap his old pal back.

“I’ve had those periods in my career when I was sitting around waiting for a phone call,” Sam told in an interview with Business Insider. “It’s a frustrating game, that’s the downside of this business — the rejection.”

“Tom’s down in the dumps,” says a source.

“Everyone understands he’s heartbroken about losing the show. But it’s over now and he’s in a rut. He’s neglecting his health and facing some serious consequences as a result.”

Now Sam, who became pals with Selleck when they starred in the TV Westerns The Sacketts (1979) and The Shadow Riders (1982), hopes to ride to his rescue.

“He wants to help Tom out and maybe go to the gym together, anything to get the guy out of the doldrums,” says the insider.

“Sam could give him tips for a healthier way of life. It’s not just about changing diet and exercise, it’s changing attitude towards life’s adversities.”

“His heart is coming from a place of love and care for Tom, who he’s known for a long time.”

“Sam would hate to see Tom shorten his life span with these choices he’s making.”