By donning the article of clothing, they are not only raising awareness but also looking good while doing it! Among the celebrities who are proud to stand up for a cause include Jessica Chastain in this year's Time's Up shirt, which is a symbol of the organization that fights for equality in the workplace.
Olivia Wilde is frequently spotted making various statements with her tees, including a "badass feminist" shirt in support of My Sister organization, which fights against sex trafficking.
Sophia Bush, Tracee Ellis Ross and Blake Lively can also be added to that list, with organizations like Women's March, Women for Women International and Phenomenal Woman Campaign.
See how these and more stars support good causes in the gallery below: