quote search

i found all the cool Shakespearean quotes posted on this site while doing a search on the net. i was wondering if anyone might be able to place a quote i heard on tv, and barely remember. Hugh Grant said something like this in an interview with Katie Couric:
“Tis many a slip twixt sip and lip”.
he said that he was sure it was Shakespeare but i can’t place it and i was wondering if anyone else could.
LATERS