People often turn to others for help with regulating their emotions, a process known as interpersonal emotion regulation (IER). Emerging research has begun to document the importance of IER in well-being. However, the basic elements of IER in daily life are still not clearly understood. We aimed to better understand the characteristics of adults' everyday IER. In this 2-week experience sampling study (five surveys daily), 87 adults (mean age = 45.5 years) reported on whether, from whom (i.e., sharing partner role type and gender), and why (i.e., IER goals) they sought IER. They also indicated which IER strategies their sharing partners used, including putatively supportive (i.e., reappraisal, problem solving, affection, encouraging sharing) and unsupportive (i.e., invalidation, blaming) strategies. Results showed that most people engaged in IER. Using multilevel modeling, we found that people tended to seek IER from close versus non-close others and were more likely to seek emotion-oriented (e.g., empathy) relative to problem-oriented goals (e.g., advice). Sharing partners were more likely to provide (a) supportive than unsupportive strategies, with reappraisal, problem solving, and affection being most frequently endorsed, and (b) problemoriented supportive strategies (e.g., problem solving) than emotion-oriented supportive strategies (e.g., affection). We also explored gender and age differences in IER. This research contributes to the broader emotion regulation literature by elucidating everyday IER behaviors in adults. Findings highlight the ubiquity of IER as well as people's tendencies when seeking and providing IER.