BTS Is Unveiling a New Facebook Messenger Sticker Pack for National Best Friend Day

The BT21 animated characters were created in partnership with Line Friends

Messenger camera effects and stickers featuring BT21 are available through June 10 Facebook

National Best Friend Day is coming up June 8, and BT21 and Facebook Messenger released a new sticker pack Thursday to mark the event, Best Friends Forever. David Cohen is editor of Adweek's Social Pro Daily.