Nope, Chelsea Clinton's fairy-tale marriage to Marc Mezvinsky is not headed for a sad ending.

Multiple insiders are shooting down tabloid reports that the newlyweds are headed for a bitter split.

"There's absolutely no truth" to the divorce rumors, one source tells

Adds another pal: "They're one of the best and most in love couples I've ever known."

Both from political families, the former First Daughter, 30, and investment banker Mezvinsky, 33, became friends at a political retreat back in 1993. They went public with their romance in 2005, and wed lavishly at an estate in Rhinebeck, NY in August of last year.

"There wasn't a dry eye in the house," one attendee told the New York Daily News of the buzzed-about nuptials.

"He is great," President Bill Clinton gushed of his son-in-law. "He is a great human being."

The newlyweds live in NYC -- and were spotted having dinner at eatery Ilili on Jan. 25. "They seemed fine!" an onlooker tells Us.