See Barbara Bush's Stunning Wedding Photos from Her Surprise Celebration in Maine

Barbara Bush, 36, beamed as her father, former President George W. Bush, 72, displayed his signature grin while walking his daughter — and America's former first daughter — down the aisle at the Bush family compound in Kennebunkport, Maine on Sunday.

Barbara Bush led the way on the backyard's rocks as screenwriter Craig Coyne, 36, helped his new bride.

Calling in to Today on Monday morning, Jenna Bush Hager said that her sister decided to marry in Maine because their grandfather, former President George H.W. Bush, 94, is living at the family compound. "I'm crying 24 hours later…there were so many happy tears," said Jenna, 36.

"It's really sweet. The 'something borrowed' that I'm wearing is this bracelet that my grandfather gave to my grandmother on their 70th anniversary," Barbara Bush told PEOPLE. Meanwhile, her "something blue" was a pair of earrings from her twin sister, Jenna Bush Hager.

Barbara Bush posed with her mother, former first lady Laura Bush; father, former President George W. Bush; grandfather, former President George H.W. Bush; sister, Jenna Bush-Hager; brother-in-law, Henry Hager; and nieces, Margaret and Poppy.

Jenna Bush Hager's daughters, Margaret, 5, and Poppy, 3, served as their aunt's flower girls along with the groom's niece, Emma, 5. The trio had fun with petals as Barbara Bush and her new husband, screenwriter Craig Coyne, held hands in front of the beach.

Wearing a custom ivory silk crepe Vera Wang gown, the bride leaned in as her new husband kissed her cheek.

Jenna Bush Hager smiled from ear to ear while supporting her twin sister during what she told Today was a "beautiful" ceremony.

Wearing a grey suit, Craig Coyne kissed his new wife, Barbara Bush.

The intimate celebration was attended my members of both families. In the front row, from left to right: Groom Craig Coyne's niece Emma; his father Edward Coyne Jr.; Laura Bush; George H.W. Bush; George W. Bush; and the groom's mother Darlene Coyne. In the back row, from left to right: Craig's grandfather Ed Coyne and step-grandmother B Coyne; the groom's sister Katie Coyne; Craig Coyne; Barbara Bush; Jenna Bush Hager; Henry Hager; Craig's sister-in-law Amanda Coyne; and Craig's brother and best man Edward "Trip" Coyne III.

Former President George W.Bush lit up with a smile on his daughter's wedding day.

Former President George W. Bush and former first lady Laura Bush were surrounded by their daughters, sons-in-law and grandchildren.

The bride wrapped her arms around her grandfather.