Toula Portokalos is a fictional character from the film series My Big Fat Greek Wedding. She is portrayed by actress Nia Vardalos, who also wrote the screenplay. Toula is a Greek-American woman who struggles with her cultural identity and family expectations while seeking love and independence. In the story, Toula falls in love with a non-Greek man named Ian Miller, played by John Corbett. Their relationship faces challenges due to cultural differences, but ultimately, it highlights themes of acceptance, family, and the importance of love across backgrounds.