Matthew McConaughey Wedding Details!

Matthew McConaughey and his longtime girlfriend Camila Alves finally tied the knot on Saturday, and ET has the exclusive Texas wedding details!

Alves is taking the groom's last name and is now officially Camila McConaughey, the star's rep tells People.com.

The theme of the wedding (officiated by the senior pastor of Riverbend Church, Dr. David Haney) was "island beach meets Texas" with yellow and orange colors. Preps began two weeks ago: In the nuptials area of McConaughey's sprawling, nine-acre Austin, TX, property -- known as the Old Oak Estate -- there were wispy long white tents, and in the other section there was a Texas theme. Horseshoe pits, fire pits, washer pits and tether ball were all installed for the big day, and the entrance and walkways were enhanced with landscaping.

Related: McConaughey & Alves are Engaged

Estancia Churrascaria, a Brazilian steak house, catered the wedding with a menu that included Brazilian top and bottom steak, chicken wrapped in bacon and pork sausages with cheese bread. The gaucho chefs wore tapered black pants with blue shirts and red bandanas around their neck. Staff including waiters in black pants and white shirts began to show up at 5:50 p.m. -- they waited in their cars until being picked up by golf carts. Sheriff's deputies also were positioned around the property to provide security and check in guests.

Related: Matthew McConaughey Presents Baby Vida

The 42-year-old Magic Mike star and his 30-year-old Brazilian model/handbag designer love got engaged over the holidays. The couple have two children together, 2-year-old daughter Vida and almost 4-year-old son Levi, and began dating back in 2006.