Stranger Things star Millie Bobby Brown has become the youngest person to be named by Time magazine as one of its 100 most influential people of 2018.

The 14-year-old British actress is enjoying a meteoric rise in Hollywood after rising to fame with her role as Eleven in the popular sci-fi TV show.

US actor Aaron Paul called her an "extraordinary" actress.

"She may have been 12 in years, but her spirit and mind were timeless," Paul wrote in a profile of Brown for the magazine, speaking of first meeting the teenager in New York.

"A wise woman was speaking from her cherubic face.

"It was like speaking to a future mentor with a perspective and groundedness that I could only have dreamed of at that age. Or at any age, if I'm being honest."