The fashion icon was the first Indian designer to show at Paris Fashion Week for ten consecutive years.
The brand, owned by luxury goods conglomerate LVMH, provided no specific context for the slogans, though the show comes weeks before the U.S. presidential election.
Chanel's latest outing showcased inspiration drawn from Hollywood's 1950s heyday - with a French touch.
At Dior, guests wore face masks and were given temperature checks, with crowds limited to 300 rather than the 800 to 1,000 the label would normally invite.
The protester, who sneaked in was acting in the name of Extinction Rebellion, an activist movement that aims to highlight the risks posed by climate change.
Fledgling designers can not afford to hire big venues for tiny audiences or risk a last-minute cancellation.
Couture shows play a very special role in the prestige and perception of a luxury house and sometimes are less about profit.
The actress was invited by luxury fashion house Louis Vuitton to attend their show at the Paris Fashion Week, which is due to run till March 3.