To determine the 25 busiest actors and actresses in Hollywood, 24/7 Wall St. reviewed the number of major feature films and television series each performer has starred in since the beginning of 2012 as listed by IMDb. Only movies with more than 10,000 user reviews and television series with more than 5,000 reviews were counted. To be considered one of the film’s or series’ stars, performers must be listed among the four top actors or actresses on the film or series’ IMDb star listing. Ties were broken using total acting credits. The highest rated film or television series each performer appeared in, total acting credits, and award data also came from IMDb.