Dianna Agron, Reba McEntire and Shaquille O'Neal are among the celebrities going purple for Spirit Day.

Friday's show of support for efforts to combat the bullying of LGBT teens also included landmarks such as Times Square, JFK and LAX airports, the New York Stock Exchange and the Welcome to Las Vegas sign taking on a purplish hue.

Many morning news hosts are also participating, including those at CNBC, CNN, MSNBC, Good Morning America, TODAY and Live! With Kelly and Michael.

The icons on the White House's official Facebook, Twitter and Google+ pages were turned purple.

All major professional sports teams are also participating, including NBA, WNBA, NFL, NHL, MLB, MLS, WWE and NASCAR. All MLB teams turned their team twitter photos purple.

β€œFrom sports leagues to faith institutions to national monuments, schools and celebrities, millions of Americans will unite this week in an extraordinary show of support for LGBT youth and in a stand against bullying,” said GLAAD President Herndon Graddick. β€œAt at time when 8 out of 10 LGBT youth report being harassed at school, it's now more important than ever that we let every young person know that it's okay to be who you are.”