Better known by his pseudonym El Rubius or elrubiusOMG, Rubén Doblas Gundersen is a Spanish YouTube personality whose channel primarily consists of gameplays and vlogs.

His channel currently has had over 5 billion views and 24 million subscribers, making it one of the highest channels subscribed on YouTube. He also boasts to be one of the second most subscribed channel in the Spanish language, and the most subscribed YouTube channel in Spain.

A tweet from Rubius's official twitter account was the most retweeted tweet in the world for the year 2016. The tweet was retweeted more than 1.3 million times.