Washington, Oct. 6 -- Filmmaker Rob Reiner, who is known for directing the romantic comedy 'The Sure Thing', coming-of-age drama 'Stand by Me', fantasy adventure 'The Princess Bride', and romantic comedy 'When Harry Met Sally...' recalled why it became awkward for him to cast his mother in a key scene in his 1989 classic, according to The Hollywood Reporter.

Estelle Reiner famously delivered one of the greatest lines in movie history in her son's 1989 classic.

'When Harry Met Sally...' is a 1989 romantic comedy film directed by Rob Reiner and written by Nora Ephron. Starring Billy Crystal, Meg Ryan, Carrie Fisher, and Bruno Kirby.

He appeared on CBS' 60 Minutes, where he opened up about his newly released sequel, Spinal Tap II: The End...