UK Oscars
The Legally Blonde star was visibly shocked at her then-husband's unplanned remark at the 2002 Academy Awards.
The Hillbilly Elegy star and seven-time Oscar nominee dissed Gwyneth's Academy Award for Shakespeare in Love.
There have also been big changes to the eligibility requirements about which films can be nominated.
The Academy is making changes aimed at combatting the dearth of diversity in its nominees.
The actor said his late co-star "refused" to participate in an opening monologue that poked fun at the film's gay love story.
It was highly anticipated that she would have been nominated for an Academy Award for her role in Hustlers.
The US President took aim at the South Korean movie at a rally in Colorado.
The Black Swan star wore a cape to Sunday's Oscars embroidered with the names of female filmmakers ignored by the Academy.
The awards show organisers have explained why many big-name stars were left out of this year's tributes section.
The two actors, who quietly dated from 2009 to 2011, bumped into each other at the ceremony.