Which Avenger star has finally joined twitter?

Avenger fans can rejoice, as Robert Downey Jr., who is famous for playing Iron Man, has finally joined Twitter.

Of course, the 49-year-old actor kept his introduction onto the social media site simple, by only posting two tweets so far.

The Avenger star’s first tweet,  involved a picture of himself holding a sign of his Twitter handle “@RobertDowneyJr”, which had  the caption: “Talk to me Twitter.”

Robert went onto to thank fans for all the Twitter love, but questioned how they were able to keep their thoughts to 140 characters.

Of course what we love, is the actor’s Twitter bio, which really says all: “You know who I am.”

Welcome to the madness Robert, we can’t wait to see what you are going to tweet next.