A letter believed to be from former U.S. Sen. George Mitchell of Maine was among those included in a scrapbook celebrating the 50th birthday of Jeffrey Epstein, a powerful financier and convicted child sex abuser who died by suicide in 2019 while serving a prison sentence.

Mitchell, a prominent Democratic politician who went on to negotiate the Good Friday agreement in Northern Ireland, reportedly sent a handwritten letter in cursive to Epstein in 2003, calling him a “good friend” — one he met by chance about a decade earlier at an airport in Washington, D.C.

“Dear Jeffrey, The beginning of a new year is an appropriate time to count our blessings. Among mine is your friendship,” Mitchell wrote. “Among your blessings has been the opportunity to lead a full, exciting, and fantastically varied life.”

Mitchell had previously been mentioned as an Epstein associate in testimony from one of his victims but was never directly linked to child sex abuse and denied any knowledge of Epstein’s criminal actions.

Mitchell’s letter appears in the so-called “birthday book” compiled by Epstein’s then-girlfriend and accomplice, Ghislaine Maxwell.

The book, which includes a sexually suggestive letter apparently signed by President Donald Trump, was released Monday by the House Oversight Committee.

Mitchell’s letter was written in 2003 — four years before Epstein was first indicted on charges. It appears tame compared to other entries, some of which included nude photos and drawings, including one allegedly from Trump, who denies writing it.

“Now that you’ve reached a critical milestone, I hope you will intensify your activities in the widest possible range of issues, especially in the field of science where you’ve already done so much,” Mitchell wrote. “P.S. As you know, Heather shares your birthday, confirming my belief that a lot of great people were born on January 20!”

Mitchell was likely referring to his second wife, Heather MacLachlan, whom he married in 1994.

A spokesperson for Mitchell, 92, did not comment Tuesday on the letter’s authenticity but said “the Senator stands by his prior statements regarding Epstein.”

“During the time he knew Epstein, he had no knowledge of Epstein’s actions involving underage girls,” the spokesperson said in an email. “He first learned of those actions through published reports of Epstein’s prosecution in Florida. He never had any contact with Mr. Epstein again.”

Mitchell had previously been mentioned among others in a 2016 deposition by Virginia Roberts Giuffre, who said she was kept as a sex slave by Epstein.

Other names included former New Mexico Gov. Bill Richardson, Britain’s Prince Andrew, financier Glenn Dubin, former MIT scientist Marvin Minsky and Jean-Luc Brunel, a well-known modeling agent.

None were charged.

Giuffre alleged that Maxwell instructed her to give erotic massages and sometimes have sex with powerful men.

“They instructed me to go to George Mitchell, Jean-Luc Brunel, Bill Richardson, another prince that I don’t know his name. A guy that owns a hotel, a really large hotel chain, I can’t remember which hotel it was. Marvin Minksy,” she said, according to the transcript.

In 2019, Mitchell denied any knowledge of Epstein’s criminal activity and said he had “never met, spoken with or had any contact with Ms. Giuffre.”

Mitchell was a former U.S. attorney and U.S. District Court judge when he was appointed to the U.S. Senate in 1980 to finish Sen. Edmund Muskie’s term after Muskie was named secretary of state. Mitchell was reelected in 1982 and in 1988. He was elevated to Senate majority leader in his second term.

Mitchell turned down an offer from Clinton to be a U.S. Supreme Court nominee and instead spent several years as U.S. special envoy for Northern Ireland while the nation was plagued by sectarian violence. He later chaired the peace negotiations that led to the Good Friday Agreement in 1998.