Dear MultiMediate fans, We are pleased to announce that the MultiMediate Challenge 2022 was accepted at ACM Multimedia as a Grand Challenge! This year, we’ll be focusing on backchannel prediction and agreement estimation, while last year’s tasks will still be available. We invite you to visit our website (https://multimediate-challenge.org/) and take a look at the attached Call for Participation for more details on this year’s challenge. Please do not hesitate to get in touch if you have any questions. We hope you’ll be as excited for this year’s challenge, as we are! Best regards, Dominike Thomas and all the MultiMediate organizers