Who played Steven Hyde in 'That '70s Show'?

Who played Michael Kelso in 'That '70s Show'? In which TV series is Michael Kelso a main character? Who played Jackie Burkhart in 'That '70s Show'? In which TV series is Jackie Burkhart a main character? In which TV series is Steven Hyde a main character? Who played Red Forman in 'That '70s Show'? Who played Tony Soprano in 'The Sopranos'? In which TV series is Tony Soprano a main character?