According to the rolling mill machine we provide a rolling mill comprising a plurality of roll passes for progressively forming a workpiece to a desired final cross-sectional shape wherein each roll pass comprises a pair of rotatable mountings, the mountings being disposed on opposite sides of a pass line of the mill, each rotatable mounting carrying at least two rolling means of different configuration to form the workpiece to a different final shape and rotation of the mountings permitting a selected rolling means of each mounting to be disposed, at a rolling position, on opposite sides of said pass line to engage and form the workpiece and wherein the mill has a drive means to rotate at least one rolling means of at least one of said roll passes when disposed in said rolling position. Preferably the workpiece is advanced through the rolling mill by virtue of driving engagement between the workpiece and the or each driven rolling means of said at least one roll pass. Preferably, said drive means comprises, at said at least one roll pass, a drive shaft and coupling means to couple the drive shaft to a first rolling means carried by one of said mountings when at its rolling position. The coupling means may couple the drive shaft to the first rolling means when the rolling means is at its rolling position and un-couple the drive shaft from the first rolling means when the rolling means is spaced from its rolling position. The coupling means may comprise a pair of gears, one driven from the drive shaft and the other driving said first rolling means and which are brought into meshing engagement as the first rolling means is brought to its rolling position. At said at least one roll pass, each rolling means carried by one of said mountings may have a driven gear connected thereto, the driven gear of each rolling means of said one mounting being moved into mesh with the driving gear connected to said drive shaft when said rolling means are moved into their respective rolling positions.