Communicating thoughts and needs is one of the most essential components of being human. In the United States, 6.4 million preschool-age children are diagnosed with a language disorder (American Speech-Language-Hearing Association, 2019). Many of these children also exhibit co-morbid behavior issues. Difficulties with effective communication and behavior can result in academic, social, and personal issues for these children (Balch & Ray, 2015). While speech-language pathologists (SLPs) are well versed in providing communication interventions, there is a lack of specific knowledge related to behavioral aspects. Collaborating with play therapists (PTs) who work with preschool youth can enhance this knowledge and potential interventions. For instance, relationship-based play therapy interventions such as Child Teacher Relationship Therapy have proven to be effective at helping to develop positive relationships and behaviors in non-counseling settings (Socarras et al., 2015). When integrated with developmental language strategies, play therapy skills can potentially address communication, social, and behavioral needs of preschool children with comorbid language and behavior issues (Parsons et al., 2019). The purpose of this manuscript is to discuss the development, training, and application of a relationship-based play therapy intervention known as Play and Language Therapy delivered collaboratively by credentialed PTs and SLPs working with preschool children with language disorders and behavioral issues.