Who sings this rock song?

I heard this song on the radio a lot of times, but I dont know who its By!
Some of the lyrics are :

'knock knock knocking on heavens door'

Its a rock song.
if you know what it is please tell me!
Tanx!

Guns and Roses

Guns and Roses

I thought it was Knoking on Heavens Door, but I could be wrong. Why don't you google both of them to see which one is right.

GUNS and ROSES

Errr NO... it was Bob Dylan.

GnR covered it

..But Dylan's sounds sooo much better. Then again, I'm a sucker for anything by him. To be honest, I'm not much of a Guns and Roses girl.. haha

THANX FOR THE HELP!

It is called 'Knockin' on Heaven's Door' written by Bob Dylan, for the motion picture
'Pat Garrett and Billy the Kid' and is performed in the scene where the Sheriff is gut shot and is dying.