Three of the most well-known Angry Birds characters are joining Sonic Dash!

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Sega and Rovio have just announced a special event for Sonic's popular mobile game in which characters from Angry Birds Epic -- Red, Chuck and Bomb -- will be playable in-game in Sonic Dash for the App Store, Google Play, Amazon Appstore and Windows Phone Store.

“We were thrilled with the opportunity to work with Rovio on this integration,” said Chris Southall, CTO of Hardlight. “The expressive, colorful, and fun characters from Angry Birds Epic lend themselves flawlessly to Sonic Dash and really enhance the overall experience.”

The event starts today and will run for three weeks, featuring a different Angry Bird from Angry Birds Epic each week, including Red ‘Knight,’ Chuck ‘Mage,’ and Bomb ‘Pirate.’ Players can dash as usual through the game and collect special Angry Birds Epic tokens to unlock featured characters. Once a character is successfully unlocked, it will remain playable following the close of the event.

Since it's a free-to-play title you also have the option to purchase any of the birds with premium currency.

“Our EPIC Sonic collaboration together with SEGA is a fantastic milestone for Angry Birds,” said Wilhelm Taht, Head of External Products at Rovio. “Having two such iconic game characters and games work seamlessly together will delight millions of fans worldwide in both Sonic Dash and Angry Birds Epic.”

This comes on top of the news that Sonic Dash has hit over 100 million downloads since its launch in March of 2013, which makes it the most downloaded Sonic mobile game in history.