The news of the sudden death Wednesday of "Sopranos" star James Gandolfini sent shock waves throughout the entertainment community, and many stars took to Twitter to express their condolences.

Carson Daly ("The Voice") tweeted, "SO SAD! PRAYING FOR HIS FAMILY- wow- Shocked by this news today...."

From Jimmy Kimmel: "I'm sadder about James Gandolfini than everyone else."

Jonah Hill ("This Is the End"): "I'm truly heartbroken to hear that James Gandolfini has passed away. He is one of my all time favorite actors. Tragic loss."

Steve Carell: "James Gandolfini. What a great loss."

And from Christina Applegate: "I am so deeply saddened by the untimely passing of sweet James Gandolfini! My heart is broken for his family!! I'm in shock"

Gandolfini died of an apparent heart attack while vacationing in Italy with his son. He was 51.