Lee is credited with creating the Marvel Universe, a jamboree of comic book characters like Spider-Man and the X-Men, and the man behind the Indian superhero Chakra.
"Sonam, who recently traveled to Arizona to encourage the south Asian community to vote in the US presidential elections, made a pit stop in Beverly Hills here where she met Lee," said a source.
The daughter of actor Anil Kapoor -- who starred in Oscar-winning film "Slumdog Millionaire" -- also posted her superhero moment on Snapchat.
In the photograph, Sonam is seen smiling while Lee in his bright yellow sweater is seen engrossed in the conversation.
Sonam was in Arizone to join international celebrities in supporting Hillary Clinton in the US presidential elections, which Donald Trump won on Wednesday.