Katy Perry, Orlando Bloom, Jennifer Aniston and Justin Theroux attend star-studded birthday bash: Pics

Tina Smithers Peckham

Exes Katy Perry and Orlando Bloom may have crossed paths Saturday night while celebrating the birthday of a mutual friend.

RELATED: Orlando Bloom Gets Candid on Katy Perry Split and Those Naked Paddleboarding Pics: 'We're All Grown-Up'

The pop singer and her actor ex-boyfriend were photographed arriving separately to the Peppermint club in West Hollywood, California, both attending jewelry designer Jennifer Meyer's star-studded 40th birthday party.

Katy Perry leaves the Peppermint club after celebrating Jennifer Meyer's 40th birthday in West Hollywood. Orlando Bloom also attended the birthday party for Jennifer Meyer at the Peppermint club. Katy and Orlando recently split up but now knowing that they both were at a club attending a party. There's a possibility that the two might try to get back together again. 23 Apr 2017 Pictured: Katy Perry. Photo credit: MEGA TheMegaAgency.com +1 888 505 6342 (Mega Agency TagID: MEGA31140_002.jpg) [Photo via Mega Agency]
Katy Perry leaves the Peppermint club after celebrating Jennifer Meyer's 40th birthday in West Hollywood. Orlando Bloom also attended the birthday party for Jennifer Meyer at the Peppermint club. Katy and Orlando recently split up but now knowing that they both were at a club attending a party. There's a possibility that the two might try to get back together again. 23 Apr 2017 Pictured: Katy Perry. Photo credit: MEGA TheMegaAgency.com +1 888 505 6342 (Mega Agency TagID: MEGA31140_002.jpg) [Photo via Mega Agency]

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Orlando Bloom leaves the Peppermint club after celebrating Jennifer Meyer's 40th birthday in West Hollywood. Orlando tries to go incognito by wearing his hat real low but it doesn't work. Katy Perry also attended the birthday party for Jennifer Meyer at the same club as Orlando. Orlando and Katy had recently broken up after dating for about a year. Now that both of them are spotted at the same club. There's a chance that the two might start dating again. 23 Apr 2017 Pictured: Orlando Bloom. Photo credit: MEGA TheMegaAgency.com +1 888 505 6342 (Mega Agency TagID: MEGA31142_007.jpg) [Photo via Mega Agency]
Orlando Bloom leaves the Peppermint club after celebrating Jennifer Meyer's 40th birthday in West Hollywood. Orlando tries to go incognito by wearing his hat real low but it doesn't work. Katy Perry also attended the birthday party for Jennifer Meyer at the same club as Orlando. Orlando and Katy had recently broken up after dating for about a year. Now that both of them are spotted at the same club. There's a chance that the two might start dating again. 23 Apr 2017 Pictured: Orlando Bloom. Photo credit: MEGA TheMegaAgency.com +1 888 505 6342 (Mega Agency TagID: MEGA31142_007.jpg) [Photo via Mega Agency]

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Meyer, who separated in October from actor Tobey Maguire after nine years of marriage, had quite the guest list at her big bash, including Jennifer Aniston and husband Justin Theroux, who came with Aniston's BFF, Courtney Cox.

A-List Hollywood actors Jennifer Aniston, Justin Theroux and Courteney Cox were seen leaving from the back door of good friend Jennifer Meyers birthday party at 'Peppermint' Night Club in West Hollywood, CA<P>Pictured: Jennifer Aniston, Justin Theroux, Courteney Cox<B>Ref: SPL1483393  230417  </B><BR/>Picture by: SPW / Splash News<BR/></P><P><B>Splash News and Pictures</B><BR/>Los Angeles:310-821-2666<BR/>New York:212-619-2666<BR/>London:870-934-2666<BR/>photodesk@splashnews.com<BR/></P>
A-List Hollywood actors Jennifer Aniston, Justin Theroux and Courteney Cox were seen leaving from the back door of good friend Jennifer Meyers birthday party at 'Peppermint' Night Club in West Hollywood, CA

Pictured: Jennifer Aniston, Justin Theroux, Courteney CoxRef: SPL1483393 230417
Picture by: SPW / Splash News

Splash News and Pictures
Los Angeles:310-821-2666
New York:212-619-2666
London:870-934-2666
photodesk@splashnews.com

SPW/SplashNews

Gwyneth Paltrow was also present, who cozied up to her pals Demi Moore, Sara Foster and the birthday girl herself for a group photo.

"I went out on a Saturday night and lo and behold, some of my best girls had up and done the same," the Iron Man actress wrote on Instagram.

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Moore, 54, looked particularly incredible in a flowy blue dress and a pair of chic glasses.

AG_193314 -  - West Hollywood, CA - Demi Moore looks elegant in a dark navy chiffon dress as she is spotted at Jennifer Meyer's 40th Birthday Bash.Pictured: Demi MooreAKM-GSI 22 APRIL 2017BYLINE MUST READ: Roger / AKM-GSI Maria Buda(917) 242-1505mbuda@akmgsi.com Alex Kantif(310) 347-8241Alex@akmgsi.com or sales@akmgsi.com
AG_193314 - - West Hollywood, CA - Demi Moore looks elegant in a dark navy chiffon dress as she is spotted at Jennifer Meyer's 40th Birthday Bash.Pictured: Demi MooreAKM-GSI 22 APRIL 2017BYLINE MUST READ: Roger / AKM-GSI Maria Buda(917) 242-1505mbuda@akmgsi.com Alex Kantif(310) 347-8241Alex@akmgsi.com or sales@akmgsi.com

WATCH: Gwyneth Paltrow Reveals the Moment She Realized She Was 'a Middle-Aged Lady'

Foster also added a pic, posing with Meyer and actress Kate Hudson.

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Hudson, who celebrated her 38th birthday on Wednesday, had a joint party with Meyer and writer Derek Blasberg last year.

For more on Meyer's split from Maguire, watch the video below.