Nikki Reed was rushed to hospital with throat problems.
The 'Twilight' star was attending the Comic-Con event in San Diego, California when she reportedly fell ill.
A source told the New York Daily News' Confidenti@l column: "Nikki said that it was probably because she's been flying so much for work. She's been to 20 cities in eight days for work obligations."
Doctors asked her to stay at the clinic whilst they assessed her and it was later revealed her ill health was due to dehydration and exhaustion.
After getting the all clear, she flew straight to Atlanta to visit her husband Ian Somerhalder before they jetted off to Nashville to attend a party.
A witness at the party added: "[She] was a bit more soft-spoken [but she] danced to country music performances and sipped on Bonnie Rose cocktails."
But not all of their travels were for work, as the couple recently visited a number of countries on their honeymoon.
When they arrived back home, Ian gushed about his "beautiful" wife.
Captioning a photograph of the pair, he wrote: "Feet back on US soil aka... New York City. Dreaming of the Costa Rica rainforest. Thank you to this beautiful country: it's land and its people. Thank you to this beautiful woman who makes every day a dream come true. Pura Vida (sic)."