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Continuing along with her non-stop promotional efforts,  Sienna Miller looked pretty in purple as she visited the “Tonight Show with Conan O’Brien” on Wednesday night (August 5).

The “Layer Cake” cutie was on-hand boosting interest in her upcoming movie “G.I. Joe: The Rise of the Cobra” – which hits theaters this Friday (August 7).

During her visit, Miss Miller revealed that things got pretty hot on the “G.I. Joe” set as she worked opposite co-star Channing Tatum.

“I burned my boobs in an explosion that went wrong,” Sienna told Conan, adding, “They’re fine. Let’s not grunt on it.”