Early Monday morning, Whitson marked her 535th cumulative day in space, becoming the first U.S. astronaut to hold the record. Whitson is currently on her third long-duration mission to the /www.huffingtonpost.com/news/iss/"}}" data-beacon-parsed="true">International Space Station.

At 1:27 a.m. ET on April 24, @AstroPeggy has officially broken @Astro_Jeff's record of 534 days in space. Wish her well with #CongratsPeggy! pic.twitter.com/ylZtOwt4lA — Intl. Space Station (@Space_Station) April 24, 2017

President Donald Trump, his daughter Ivanka and NASA astronaut Kate Rubins plan to call Whitson on Monday and congratulate her.

The astronaut has broken multiple records during her pioneering NASA career, including:

* the first woman to command the International Space Station, which she has done twice

* the record-holder for most cumulative time spent spacewalking by a woman (she’s completed eight space walks)

* number five on the all-time spacewalking list

NASA Previously, the record for cumulative time in space was held was by astronaut Jeff Williams.

In response to her latest achievement, Whitson tweeted her gratitude to those who had helped throughout her career.

It is one of those rides that you hope never ends. I am so grateful for all those who helped me on each of my missions! #LifeInSpace pic.twitter.com/msjKSg6WWH — Peggy Whitson (@AstroPeggy) April 23, 2017

Fans who want to keep up with Whitson can follow her on Twitter @AstroPeggy.