Convicted ex-state Senate Majority Leader Dean Skelos and his son, Adam, are set to turn themselves in on Tuesday to begin serving their prison sentences for public corruption.

The father and son, who are now estranged, were found guilty at their retrial last year of using Dean’s powerful position in Albany to muscle no-show jobs and cash payments for Adam.

The 70-year-old Long Island Republican was hit with a more than four-year sentence, which he’s expected to serve at Otisville, a medium-security federal lockup in upstate New York.

The elder Skelos left his home in Rockville Centre around 9 a.m., coffee in hand and wearing a blue New York Giants zip-up sweatshirt. His wife, Gail, was alongside him, her hands full with a brown folder and their dog, Rocky.

Dean declined to comment, only telling a reporter, “Have a good day.”

Asked whether he believed his 51-month sentence was fair, his wife answered for him, snapping, “No!” before the couple jumped into a car and drove off.

Adam, 36, who just welcomed his fourth child, will also serve four years behind bars at Federal Correctional Institution Danbury in Connecticut, his lawyers confirmed.

He emerged from his home just before 11 a.m. for his trip to the big house and refused to answer questions.

The two men, who live around the corner from each other in Rockville Centre, must surrender to their respective prisons by 2 p.m.

In October, they both admitted at their sentencing hearings that their relationship was ruined — a familial strain that was evident throughout their second trial.

“As you know, I have no relationship with my father and that side of the family,” Adam tearfully told the judge at the time. “We don’t talk anymore. And that is something I thought I would only experience in death.”

The pair was first convicted in 2015, but the case was tossed on appeal — and the longtime state senator threw his only child under the bus while taking the stand in his own defense at the retrial.

Dean denied his intention was to trade his office to benefit Adam but said it was “improper” for his troubled, do-nothing son to have accepted a $20,000 check for work he never did.

Still, the father begged Manhattan federal Judge Kimba Wood to show Adam leniency “so that he can be the father he wants to be.”

It worked. The second time around, the jurist shaved off a considerable chunk from her initial sentence of six and a half years when Adam was first convicted.

The Skeloses likely won’t serve their full sentences.

After serving 85 percent of their time, federal defendants can be sprung early for good behavior. In 2012, almost all of the 62,000 inmates released from prison served an average of 88 percent of their sentences, according to the Bureau of Justice Statistics.