Marc Antony. Marc Anthony actually said "This was the most unkindest cut of all".
Frasier - 1993 The Unkindest Cut of All 2-2 is rated/received certificates of: Canada:PG (video rating)
Just the Ten of Us - 1988 The Unkindest Cut of All 2-7 was released on: USA: 9 December 1988
Kendra - 2009 The Unkindest Cut 3-4 was released on: USA: 28 November 2010
My Family - 2000 The Unkindest Cut 2-2 is rated/received certificates of: USA:TV-PG
The cast of The Unkindest Cut - 1988 includes: Norman Caro Jane Cunliffe Ann Firbank Peter Gluckstein
Yes, It is on TMZ.com http://www.tmz.com/2008/12/21/robert-pattinson-unkindest-cut-of-all/
Melissa and Joey - 2010 The Unkindest Cut 3-7 was released on: USA: 10 July 2013
Off Centre - 2001 The Unkindest Cut 1-20 is rated/received certificates of: Netherlands:6
Being Erica - 2009 The Unkindest Cut 2-7 is rated/received certificates of: Netherlands:12
Antony shows the commoners Caesar's wounds to emphasize the cruelty of the conspirators' actions. When he says "this was the most unkindest cut of all" he's referring to where Brutus stabbed Caesar. Since Brutus was his friend, he really betrayed Caesar. It was like a friend "stabbing you in the back."
"Et tu, Brute?" means, "You too, Brutus?" Brutus was a favourite of Caesar, "Caesar's angel", who was even named as a contingent beneficiary in his will. Caesar has seen all of the other conspirators stab him, but last comes Brutus, who he did not expect to betray his trust and love. As Antony says, "This was the most unkindest cut of all."