Grimes took the six-week internship ahead of filming the fourth season of her television series "90210," the New York Daily News reported.
"Fashion has always been such a passion of mine but I've yet to have the opportunity to explore the world of print magazines and all the hard work that goes into producing those things we snatch off the racks and flip through every month," the 21-year-old actress said in an Internet post.
After her first day on the job, Grimes said she was "wiped."
"I really hope to make a home for myself here at Teen Vogue," Grimes said. She said she plans to "work hard to show how grateful I am for this amazing experience."
"I'm home from my first day as an intern at Teen Vogue and boy, am I wiped!" Grimes wrote on her official Web site. "With a million shoots to prepare for, the office was a zoo of clothes today and I don't think I sat down once!"
"I was definitely put to work, which is exactly what I had hoped for and while it's been a while since I've felt this exhausted, it's also been too long since I've felt this fulfilled."