Big Fat Alien Wedding

Big Fat Alien Wedding is the forty-second episode of Ben 10.

Plot
Ben, Gwen, and Grandpa Max attend a family wedding for Max's nephew Joel and his bride-to-be, Camille. Before the day of the wedding, Ben tries to go swimming in the lake, only to interrupt a mud alien's attempt to sabotage the wedding. Ben defeats the sludge alien as Cannonbolt, but finds the groom's parents pointing rifles at him soon after. He escapes with Gwen's help, and Max explains that the groom's side of the family are all Plumbers, while the bride's side are all mud-like aliens, called "Sludges", which the Plumbers were enemies with until Joel and Camille meet. This wedding represents a truce. However, on the wedding day, chaos erupts when Camille's parents and ex-boyfriend revolt against the marriage and show their true selves. As Heatblast, Ben defeats them with a little help from the angry bride. At the party, Ben dances with Camille's cousin, Lucy.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Max Tennyson
 * Joel Tennyson
 * Camille Mann
 * Gordon Tennyson
 * Betty Jean Tennyson
 * Lucy Mann

Villians

 * Mr. and Mrs. Mann
 * Camille's ex-boyfriend
 * Sludges

Aliens used

 * Cannonbolt
 * Diamondhead
 * Heatblast

Trivia

 * Camille's cousin Lucy resembles the female form of Naruto (from the anime of the same name) when he uses a disguise technique, making it second such episode to feature a background character, that resembles a Naruto character (the first was "Merry Christmas"). Lucy also resembles Kitten (who is also voiced by Tara Strong) from Teen Titans in Date with Destiny.
 * The episode title is probably a reference to the romantic comedy film My Big Fat Greek Wedding.
 * Ben turns into Cannonbolt while in his bathing suit, Diamondhead while in his regular clothes, and Heatblast in his tuxedo.