Britney Spears' younger sister Jamie Lynn Spears tied the knot Friday.

The former "Zoey 101" star got married to businessman Jamie Watson in New Orleans as her famous older sister and 5-year-old daughter Maddie were both in attendance for the beautiful wedding ceremony.

CBS News reports that Maddie was the flower girl for her mom's wedding while Britney's two sons, Jayden and Sean, served as ring bearers.

Jamie Lynn Spears announced her engagement to the 31-year-old a year ago on Instagram. The couple had reportedly been dating for about three years.

The Daily Mail reports that Britney Spears seemed all partied out after celebrating her little sister's wedding at the Auduborn Tea Room.

The next day, the 32-year-old pop sensation was spotted leaving her hotel in New Orleans to spend time with her family.

E! News reports that for the ceremony, Spears looked stunning in a plunging grey form-fitting gown with a bejeweled neckline while the 22-year-old bride donned a lace Liancarlo gown.

There were about 150-200 guests at the reception along with a five-tiered wedding cake.

Jamie Lynn Spears was previously engaged to Casey Aldridge, the father of her daughter, before they split in 2010.

As she sends off her sister into the marriage world, Britney Spears proved that she's over ex-husband Kevin Federline as she was spotted actually having a good time with K.Fed's pregnant wife.

The "Alien" singer and Federline's second wife, Victoria Prince, were seen laughing and chatting at Britney's son's soccer game.

The singer brought along her boyfriend David Lucado, reported TMZ.

It has been reported that even Kevin and David are good buddies.