Zac Efron Trends on Twitter as Fans React to 'New Face'

Zac Efron has become a trending topic on Twitter after a video of his latest appearance went viral.

The 33-year-old actor participated in Bill Nye‘s Earth Day! The Musical video, which went live on Facebook on Thursday (April 22) for Earth Day.

Zac only makes a brief appearance in the video, but fans couldn’t help but notice that he is sporting a much more defined jawline these days. It looks like he’s added on a lot of muscle recently and it has given him a brand new look.

Fans on Twitter have been commenting on his “new face” and there have been more than 70,000 tweets as of this posting.

Click inside to see the new look and to read fan reactions…

You can see the side-by-side of the new and old looks below.

“I refuse to believe this is Zac Efron,” one person wrote. Another person said, “Holy sh-t I can’t believe Zac Efron is Handsome Squidward.”

Lots of fans are also defending Zac. One person said, “So Zac Efron is trending because people don’t like his face! Is everyone blind????”

Watch the full Earth Day! The Musical below. Zac appears at around the 1:50 mark.

Read more tweets below.