McGowan, 39, wore a strapless white dress and a veil for her special day, with her hair up in a bun. She also carried a bouquet of pink flowers down the aisle. The couple's vows lasted 15 minutes. A New Orleans swing band then played as guests were escorted to a cocktail area with stunning white lights surrounding a courtyard.
The "Tell-Tale Heart" star and Detail first announced their engagement in July after more than a year of dating, with the actress previously telling Us that she thought her artist beau was "magic."
Next up? The happy newlyweds are heading to Tahiti for their honeymoon, according to McGowan. "I've never been," she previously told Us. "I've always dreamed of having one of those little huts over the water."
Keep clicking to see more photos of the newlyweds ...