Sean Penn just celebrated a major first—his first tweet, of course.
The Oscar winner probably didn't expect to log onto Twitter when he walked onto the set of The Late Show with host Stephen Colbert. However, the comedian managed to get the luddite his own handle on the website and even offered an introductory course on hashtags.
"Would you like to make your first tweet right now?" Colbert asked the star and Penn obliged.
As a nod to his brand new audiobook, Bob Honey Who Just Do Stuff, Penn gave a shout out to the downloadable free audiobook's mysterious author, Pappy Pariah.
"Pappy, where r ya?" the Milk star suggested. Colbert threw in the "r" for millennial appeal—and it worked. So far, the tweet has garnered nearly 1,000 likes and almost 500 retweets. He's already close to cracking 2,000 followers just overnight.
As for that very important hashtag, the two settled on the topic of the night, #BobHoney. As Colbert described, hashtags are "the future, Sean. It's how we communicate."
Welcome to the future, Penn.