Peace, love and under . . . threat of litigation.

Woodstock 50, the most legally fraught celebration of good vibes on record, has racked up yet more attorneys’ fees, Page Six has learned.

Original Woodstock co-organizer Michael Lang announced in December that he planned to host a festival this August to mark the 50th anniversary of the 1969 cultural landmark. But the fest has since been dogged by a string of catastrophes, with its financial backer and production company pulling out and local authorities refusing permits — and with Lang threatening lawsuits throughout.

WOODSTOCK 50 DENIED PERMIT IN UPSTATE NEW YORK

In the meantime, another flower child, Kenn Moutenot, decided to stage his own tribute to Woodstock, planning a two-weekend “Woodstock Experience” in the hills of the Blue Ridge Mountains in North Carolina.

But, perhaps predictably, Lang wasn’t about to let a paean to more compassionate times go unmolested by threats of litigation.

WOODSTOCK 50 IN DOUBT, ORGANIZERS SAY THEY'RE STILL IN TALKS FOR VENUES

WOODSTOCK 50 SUES INVESTORS

In quick time, Moutenot received a letter — seen by Page Six — from the firm of Hunton Andrews Kurth on behalf of Lang. It warns that Moutenot’s event’s unauthorized use of the “WOODSTOCK® trade name and trademark will cause consumers and the trade to mistakenly believe that [Lang’s] Woodstock Ventures has approved, or is connected with, your activities, and will dilute the strength of the WOODSTOCK® name and mark.”

The letter demanded Moutenot cease the use of the name, so the new festival will now go ahead as WE2019.

WOODSTOCK 50 CANCELED AS ORGANIZERS ADMIT THEY CAN'T BOOK EVENT DESERVING OF TITLE

Moutenot’s event — which boasts original Woodstock performers including John Sebastian of the Lovin’ Spoonful, Jefferson Starship, Canned Heat, Ten Years After and Melanie, among many other acts — will take place over the weekends of Aug. 9-11 and Aug. 16-18 at Saloon Studios in West Jefferson, NC, “an Old West town atmosphere set on 100 acres of North Carolina.”

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Lang insists Woodstock 50 will go ahead next month. His reps didn’t get back to us.

This article originally appeared on Page Six.