If you are asking if Shakespeare himself ad libbed you would get a resounding no. For Shakespeare was the author of the plays, the actors themselves would need to be the ones guilty of an ad lib.
I do, however, understand the question is asking if, in fact, any of the Shakespearean actors ever used an ad lib.
This would be impossible to factually. An ad lib is something added in to fill an entrance, exit or lengthy pause during a performance and even used to cover if a fellow actor messes up or forgets a line. Therefore there would be no proof anywhere to say whether or not this occurred. The only way to tell is to compare the performance to the script, since there were not recording devices (obviously) we could never know.
I would like to believe Shakespearean actors did not ad lib. Since his work is written in a specific rhythm it would be frowned upon to ruin the flow of the piece and ad in things that were unnecessary. I have been involved with Romeo and Juliet recently and found that when an actor missed even the tiniest word in a line the entire flow of the scene would get disturbed. I could see how Shakespeare would greatly press onto his actors to say the lines verbatim.
The term is known as "Ad Lib" which means being spontaneous. The late actor Robin Williams was frequently asked to ad lib lines in movies throughout his lifetime. In the old TV show Mork & Mindy (with Pam Dawber) most all of his lines were spontaneous.
Shakespeare was born in 1564 AD.
Historians have found no evidence that Shakespeare had ever left Britain, it is believed he lived out his entire life from there from 1546 to 1616 AD.
He was born at a very early age. He was about 0 years and 0 months and 0 days old at the time!
Shakespeare used as his source material Life of Caesarand Life of Brutus, both by Plutarch (a 1st century AD Roman historian).
ad lib is a latin abbreviation for 'freely'
Tim Conway is quite masterful with the ad lib. I prefer to ad lib this part of the scene.
Ad Lib - typeface - was created in 1961.
Another term for ad lib is improv, or improvise.
The duration of Ad-lib Night is 1.65 hours.
Ad-lib Night was created on 2006-11-30.
The cast of Ad and Lib - 1954 includes: Joe Austin as Ad
Ad Lib - 1981 I was released on: USA: 1981 (limited)
An ad lib is a portion of a musical work which is to be played freely, or at one's own pleasure.
"Ad lib" is short for the Latin phrase "ad libitum," which means "at one's pleasure" or "at will." In performance or presentation, doing something ad lib means doing it spontaneously or without prior preparation.
Ad lib in medical terms means as much as the patient wants.
The teleprompter failed, forcing the candidate to ad-lib the rest of his speech. Some of the funniest parts of the show occurred when one of the actors would ad-lib his lines.