Tributes poured in across social media Thursday following the death of legendary actor Patrick Stewart.

Fans and fellow stars remembered his iconic roles and lasting impact on generations of audiences.

William Shatner, who starred as Captain James T. Kirk in the "Star Trek" franchise, wrote Thursday, "What a heartbreaking week it has been. Sir Patrick Stewart was a friend, a colleague, and a magnificent actor. From the stage to the bridge of the Enterprise, he brought intelligence, grace, and a deep sense of humanity to everything he did. Captain Picard stood for the best of us, and so did the man who played him. I was filled with affection and admiration for him and his work. My heart goes out to Sunny and his family. He will be deeply missed." George Takei, an actor known for his role in the "Star Trek" franchise, wrote, "Fans across the world mourn the passing of a true and irreplaceable legend. As Captain Jean-Luc Picard, Patrick Stewart took the starship Enterprise to places it had never gone before, and he inspired a whole next generation of star-gazers who looked longingly ahead to a brighter future for all humanity. Our hearts are heavy, indeed. Rest in the heavens, Captain." Actor Hugh Jackman, took to Instagram Thursday, posting two photos of the pair together, including one showing Hugh wrapping his arm around Patrick.