© Getty Images/BrunoPress

Demi Lovato -

The singer is seen leaving 'The Elvis Duran Show' in New York City, wearing classy PJs.

© BrunoPress

Gigi Hadid -

The model is seen leaving her apartment in New York City wearing striped pajamas with high heel sandals.

© Getty Images

Kourtney Kardashian -

Kourtney Kardashian knows how to fly comfortably and look good at the same time. Her secret? Silk pajamas!

© BrunoPress

Jared Leto -

Jared Leto is seen in LA wearing Gucci floral silk pajama pants paired with a silk top. 

© BrunoPress

Rihanna -

RiRi looking stunning on the red carpet with PJs and high heels.

© Getty Images

Winona Ryder -

The actress poses in bed at her New York City apartment. 

© Getty Images

Geena Davis -

The actress is spotted in LA wearing a pink sweatshirt and plaid Loyola College pajama bottoms.

© BrunoPress

Kelly Brook - Kelly Brook may go out in pajamas but she doesn't leave her high heels behind.

© Getty Images

Hugh Hefner -

The founder of Playboy magazine wore PJs all the time, and he looked great in them!

© Getty Images

Rod Stewart -

The artist poses at the Royal Garden Hotel in London, wearing pajamas. 

© Getty Images

John Lennon and Yoko Ono -

Their bed protest against violence at the Amsterdam Hilton Hotel became famous all over the world. And of course, they wore PJs!

© Getty Images

Matt Damon -

The actor in his pajamas at the 48th Annual ICG Publicist Awards in Beverly Hills, California.

© Getty Images

Sophia Loren -

The beautiful Italian actress wearing PJs in 1966.

© Getty Images

Heidi Klum -

Heidi Klum knows how to travel in style, and of course, in comfort!

© Getty Images

Gisele Bündchen -

Why not wear your PJs to the beach? Gisele Bündchen thinks it's a good idea!

© Getty Images

Dwyane Wade -

The former NBA star attends Variety and Women In Film's pre-Emmy celebration in elegant pajamas. 

© Getty Images

OIivia Munn -

The actress is seen wearing beautiful floral PJs in New York City.

© Getty Images

Rita Ora -

The singer dazzled at the Fashion Awards 2018 in London, in her stylish pajamas.

© Getty Images

Linda Evangelista -

The former supermodel looking gorgeous in a red tartan cotton pajamas by Paul Stuart and a Pendleton robe.

© Getty Images

Kurt Cobain -

The late Nirvana front man gives an interview in bed in Tokyo.

© Getty Images

Audrey Hepburn -

The actress in PJs as Princess Anne in the 1953 film 'Roman Holiday.' 

© Getty Images

Kesha - If it's so comfy, why not fly in it? We're assuming that's how Kesha came to this fashion decision.

© Getty Images

Nicola Roberts -

The ex-Girls Aloud member wears a luxurious St-Germain x House of Holland silk pajama set.

© Getty Images

Jay Leno - Only Jay Leno would wear SpongeBob SquarePants pajamas under a suit jacket.

© Getty Images

Karolina Kurkova -

How does the model manage to pull off an outfit that's equal parts elegant, fun, and laid-back?

© Getty Images

Elle Fanning -

The actress is seen leaving NBC's 'Today Show' wearing a onesie.

© BrunoPress

Cliff Richard -

The then-teen pop idol poses at home wearing flannelette striped pajamas.

© Getty Images

Beverly Johnson -

The first African-American model to appear on the cover of American Vogue magazine poses in pajama pants and a halter top by Young Edwardian for Arpeja.

See also: Celebs in sweats—Quarantine fashion inspiration

© Getty Images