UPDATED June 22 at 11 a.m. ET. Originally posted June 21 at 8:14 p.m. ET

It's official! Katie Couric is a married woman!

The talk show host tied the knot with fiancé John Molner at her East Hampton, N.Y. home on June 21 — and Closer Weekly has all the details!

"The ceremony ended at 5 p.m. and guests were bussed from Katie's East Hampton estate to the reception location at Topping Rose House in Bridgehampton," an eyewitness tells Closer.

About 50 of Katie and John's closest friends and family joined the couple to celebrate their union at the stunning and modern space, which was decorated with bouquets of white hydrangeas.

Pre-dinner cocktails were held on the lawn as the sun set and the woman of the hour simply stunned. "Katie looked so radiant," the onlooker shares.

After speeches promptly ended at 9:30 p.m., guests noshed on dinner while songs like Sting's "Desert Rose" set the mood.

"The celebration went well into the night with guests still seated for dinner, dessert, and speeches after 11 p.m.," says the eyewitness.

One of the sweetest moments of the night took place when Katie's best friend, Wendy Walker, paid tribute to the bride and groom.

"Katie was beaming with joy as her husband tenderly caressed the nape of her neck and laid a gentle kiss upon her cheek," adds the observer. "It was an intimate celebration and Katie appeared to be in total bliss."

Katie confirmed she said "I do" when she posted the first photo of the pair as newlyweds on her Twitter account.

"So excited to make my debut as Mrs. John Molner!" Katie captioned the pic, which shows the new bride beaming from ear-to-ear in her gown as she lovingly looks up at her new hubby against the backdrop of her built-in pool.

As Closer Weekly previously reported, the excited groom slipped “a lovely micro-pavé 2-carat diamond wedding band” on her finger when the two exchanged vows.

The beautiful event comes just a few days after the 57-year-old celebrated with a bachelorette party at NYC’s Le Midi restaurant in Union Square, where the group of ladies in attendance had a ball singing karaoke.

The bride revealed to Closer last month her soon-to-be-hubby was helping out with the details for their big day.

"I have a great fiancé who’s very decisive and also involved in the planning," she said, adding, "We just want it to be an incredibly special time for our families and friends.”

Last week, the Yahoo News anchor also shared a photo of her garden on Instagram, telling followers it was all ready for the Saturday ceremony!

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This is the second marriage for Katie, whose first husband, John Monahan passed away in 1998 from colon cancer. She has two daughters from the marriage.