Pharrell Williams, Helen Lasichanh

Pharrell Williams and Helen Lasichanh attend the Costume Institute Gala for the "PUNK: Chaos to Couture" exhibition at the Metropolitan Museum of Art in New York. (Larry Busacca / Getty Images / May 6, 2013)

Pharrell Williams and long-time girlfriend Helen Lasichanh got pretty lucky over the weekend -- they tied the knot!

The "Get Lucky" singer and his new wife boarded a yacht in Miami called "Never Say Never," People and Us Weekly reported, before setting sail for the Kampong National Tropical Botanical Gardens in Coconut Grove where they reportedly exchanged vows.

The Grammy-winning record producer and Lasichanh have been dating for more than five years and have a 4-year-old son named Rocket together. They reportedly got engaged last summer and it was widely reported that the couple said "I Do" earlier this summer, but that doesn't seem to be the case.

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It turns out the pair applied for a marriage license in person and it was issued on Oct. 7, E! News reported, citing the Miami-Dade Clerk of Courts Marriage License Bureau Manager Robert Reboso.

The bride and groom opted for non-traditional wedding attire for their big day. Williams, 40, wore red and green tartan tuxedo and the bride wore a voluminous blue and green tartan coat over a white gown, reported the Daily Mail, which obtained photos of the couple in their garb.

Guests reportedly went with the plaid and tartan theme too, Us Weekly said.

Famed photographer Terry Richardson snapped their photos on the boat and musicians Usher and Busta Rhymes feted the bride, groom and their guests.

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"Usher and Busta Rhymes did a mini concert at the wedding," a source told the mag. "It was so fun. The little concert was amazing. It [was] the most fun wedding I've ever been to."

"Of course they're playing some of [Williams'] hits tonight," another insider said.

Williams, who saw major success this year with collaborative hits like "Get Lucky," "Blurred Lines" and "Holy Grail," spoke about the impact his family has on him during an appearance on the "Today" show over the summer.

"[Rocket is] best song that I've ever co-written," the fashion designer told host Savannah Guthrie in August. "It's awesome ... I can't tell anyone what to do. I can't give anyone relationship advice. But the bestie thing is awesome. Every night is like a sleepover."

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