Robin Roberts Reveals Shorter Hair Cut; "Good Morning America" Crew Farewell Party Pics (PHOTOS)

Robin Roberts shared several personal photos on Twitter on Monday, Sept. 10 prior to checking in at a New York hospital.

The 51-year-old "Good Morning America" host posted images showing her new short, pixie haircut and celebrating her last night before she begins the process to undergo a bone marrow transplant.

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When asked by a fan via Twitter if she cut her hair, Roberts replied, "Yep, going to lose my hair again to chemo...so cut it tonight...I am not my hair!"

"Shhhhhh...don't tell my doctors I'm up late w/ @GMA fam before I go to hospital in the AM," she captioned the group photo. 

The pic shows Roberts posed alongside "GMA" host Josh Elliott, ABC's senior executive producer Tom Cibrowski, and senior vice president of ABC News James Goldston.

In another photo with Elliott Roberts wrote "If @JoshElliottABC looks a bit tired this morning...totally worth it to me..thanks for the send off!" 

"'My last tweet for awhile. Heading to hospital...time to focus on healing. I take each & every one of you w/me in my heart. Light and love," she wrote in her last tweet.

Roberts announced on Monday, Aug. 27, during a live telecast on "Good Morning America" that Friday, Aug. 31, will be her last day on air. She had originally announced that she would check into a hospital on Sept. 4 to "begin the process."   

She will be undergoing a bone marrow transplant to treat the blood and bone marrow disease myelodysplastic syndrome, also known as "MDS".  Her sister will be her donor after she turned out to be a "perfect match," said Roberts.   

But the award-winning broadcaster postponed her scheduled treatment following the news of her mother's death two weeks ago.

Lucimarian Roberts died on Aug. 30 at the age of 88 in her native Mississippi. The cause of death is unknown.

Robin's mother became the first African-American to head the Mississippi Board of Education. The mother and daughter duo released a joint book, "My Story, My Song" this past March. 

This will not be Roberts first leave from the hit morning show. The popular co-host took a medical leave to undergo chemotherapy to treat breast cancer in 2007.

During Roberts' current absence, several news anchors and talk shows hosts will sit in Roberts' chair for a guest co-hosting gig: Diane Sawyer, Katie Couric, the hosts of "The View", etc., will contribute to "GMA" during her extended medical leave.

Though she said there is "no timetable" for her recovery or her return to the show, she tried to put her viewers and fans at ease by saying, "Just know that I'm going to come back here as soon as I can."