Pretend play is usually defined as an activity wherein objects and actions (but also affective expression, at times) are separated from their original meanings. Its developmental appearance is set around the second year of life, and increases dramatically in duration, frequency and quality when play episodes start becoming more complex, both linguistically and interactionally reaching its peak in preschool years. To date, however, little attention has been paid to how social pretend play emerges and develops before the age of three. Our study aims to investigate early spontaneous pretend play interactions between children aged 19 to 28 months attending the same kindergarten. We used micro-analytical coding of video-recorded interactions to explore sequences of interaction where children coordinated their actions to engage in social pretend play with objects. Our analyses showed that co-constructed sequences appeared organised by a turn-alternation structure already at 19 months, and children used embodied and material resources afforded by the sequential organisation of actions to dynamically manage their participation. Although explorative, our results seem in line with previous reports suggesting an early onset of social pretend play developing over a continuum from being predominately an individual activity to progressively becoming a co-constructed endeavour.