Beyoncé and Jay-Z hosted an ultra-private Met Gala after-party where guests like Leonardo DiCaprio and Mick Jagger sipped on whiskey and partied into the wee hours of the morning.

The couple and their A-list friends were spotted arriving at Crane Club’s Members Lounge through a blocked-off entrance after Fashion’s biggest night on Monday, an onlooker exclusively told Page Six.

“Leo arrived at the same time as Mick Jagger,” the spy divulged, adding that DiCaprio’s “One Battle After Another” co-star, Teyana Taylor, also showed up for the fancy fête in New York City.

Rihanna confirmed that she and A$AP Rocky would be after-partying with Beyoncé and Jay-Z.

“There’s only one after party,” The Fenty Beauty founder told Complex on the red carpet earlier in the evening.

We’re also told Beyoncé and Jay-Z’s daughter Blue Ivy, who walked the Met steps with her parents earlier in the night, was not seen arriving at the late-night bash — most likely because it was way past the 14-year-old’s bedtime.

“Partygoers walked through a constructed tunnel that led right into the members’ lounge so that paps couldn’t snap their pics,” the source shared.

We hear the glamorous event was a super late-night celebration, with guests seen departing at around 4 a.m. local time.

Hip-hop music exec Lenny Santiago shared a sneak peek inside the event by posting a video of himself walking through the tunnel into the party.

The short clip, posted to his Instagram Story and set to Beyoncé’s 2011 song “Party” on Monday, showed a black carpet leading to a wall branded with Beyoncé’s whiskey label, SirDavis — signaling that liquor was flowing inside.

Earlier in the evening, Jay, 56, and Bey, 44, stole the show at Manhattan’s Metropolitan Museum of Art, where the evening’s dress code was “Fashion Is Art.”

The “Single Ladies” singer sparkled in a skeleton-inspired gown designed by Olivier Rousteing, the former head of Balmain.

She didn’t hold back on the accessories, finishing the look with bone-adorned gloves, diamond earrings, an over-the-top bejeweled headpiece and a furry ombré coat featuring a sweeping train.

Her rapper hubby looked dapper in a Louis Vuitton suit with tails and a double-breasted vest.

The “Crazy In Love” artists’ eldest daughter made her Met Gala debut in Balenciaga.

Blue — officially the youngest person to attend the Vogue event — posed alongside her parents in a cream bubble-hem strapless gown. The dress also had a structured bustier top.

Last night marked the first time in 10 years that Beyoncé attended the stylish ball. That year, Beyoncé notably hit the 2016 Met Gala after-parties sans Jay-Z.