Vergara announced the sweepstakes in a press release and revealed that "8 out of 9 Vergaras use Head & Shoulders, now we're looking for the tenth."
"I'm excited to give one of my fans the chance to become part of my family for a day," the actress said. "We're looking for someone who flaunts their beautiful, flake-free hair with a little Vergara attitude!"
To enter fans must follow Head & Shoulders on Twitter or Instagram and share a photo of their "gorgeous, flake-free hair with hash tags #PartOfOurFamily #sweeps and tag @HeadShoulders."
"The fan whose strands make the cut will win a trip to an upcoming advertising shoot to meet Sofia and her family. The contest will run through September 8th," the release continued.
The Machete Kill actress has shared several snapshots from her upcoming Head & Shoulders campaign on her Instagram account. In one photo, Vergara thanks the brand for transforming her tresses into what they are today.