JIMMY OWES BIG $ GIG TO WIFE

Fallon was failin’ till Nancy made him clean up his act

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LATE-NIGHT TV king Jimmy Fallon inked a new megabucks deal with NBC — but sources said he has his savvy wife, Nancy Juvonen, to thank for the $50 million windfalls!

The 46-year-old comedian has seen his share of troubles since taking over “The Tonight Show” in 2014. But insiders said Nancy’s support and guidance have reformed the once hard-partying host, and he’s since been rewarded with the lucrative three-year contract.