In this situation, the most relevant team member(s) to call in for a serious conversation about the budget would be finance. They are responsible for managing the budget, tracking expenses, and ensuring that the financial planning aligns with the company's goals. They can provide insights into where the overspending occurred and whether the established annual budget was appropriate.
While other teams like production and marketing can contribute to discussions about spending related to their areas, finance would be the primary focus for assessing and understanding the budgetary issues.