Dear MultiMediate participants, This year, the challenge focuses on engagement estimation across diverse social situations, languages, and age groups. We have added the PInSoRo dataset, which features child-child and child-robot interactions annotated for both social and task engagement. Note: There will be updates to the feature sets and additional data releases in the coming weeks, but participants can already start working on the challenge now. We continue to accept submissions for the most popular tasks from previous MultiMediate iterations. For further informations please visit our website at https://multimediate-challenge.org<https://multimediate-challenge.org/> The deadline for contribution submissions will be 18 June. Best, Philipp --- I have moved to MPI for Intelligent Systems. My new email address is mueller@is.mpg.de