Over the past two decades, relationship researchers have become increasingly interested in examining whether partner support is associated with a range of outcomes in times of growth and opportunity and not merely in times of distress. In the present meta-analysis, we combined evidence across studies from different theoretical perspectives addressing the association between partner support (affirmation, responsiveness, negative support, and practical support) and goal outcomes (self-efficacy, confidence, and goal progress). Thirty-three samples from 27 reports with a total of 9,568 participants in romantic relationships were included. The results were analyzed using a random-effects model and the overall effect size was r = .27. The effect size was significantly different for different types of support with affirmation having the largest effect size (r = .40) followed by responsiveness (r = .24), practical support (r = .19), and negative support (r = -.11). Furthermore, responsiveness was a significant predictor across all goal outcomes whereas practical support was a significant predictor of goal progress and commitment but not self-efficacy. Negative support significantly negatively predicted only self-efficacy but was not a significant predictor of goal progress or commitment. Studies on affirmation did not examine commitment or self-efficacy. These results provide support for relationship theories, particularly Thriving through relationships, which suggests that partners can serve as active catalysts for thriving. The results also have implications for a wide range of areas including changing health behaviors, improving productivity and motivation at work or in education, and improving engagement and outcomes in therapy.