Charlie Sheen Remembers Two and a Half Men Costar Conchata Ferrell: ‘A Shocking and Painful Loss’

Charlie Sheen is mourning the death of his “genuine friend” and former Two and a Half Men costar Conchata Ferrell.

Following news of her passing, Sheen paid tribute to the late star on Twitter. “An absolute sweetheart,” Sheen tweeted Tuesday alongside a photo of himself and Ferrell on the popular sitcom.

“A consummate pro,” continued Sheen, 55. “A genuine friend. A shocking and painful loss.”

“Berta, your housekeeping was a tad suspect,” he joked, affectionately adding, “your ‘people’ keeping was perfect.”

For years, Ferrell — who had been acting since 1974 — played Sheen’s beloved housekeeper Berta on the CBS comedy series. Ferrell starred in the show from 2003 through the finale in 2015. She also starred in the TV series The Ranch, Grace and Frankie and The Wild Thornberrys.

Ferrell died Monday, Oct. 12 at age 77 due to complications following a cardiac arrest, Deadline reported. She was surrounded by family at Sherman Oaks Hospital in Sherman Oaks, California.

Ferrell’s manager did not immediately respond to PEOPLE’s request for comment.

Her husband, Arnie Anderson, told TMZ in July that the actress was hospitalized in May after feeling sick. Ferrell spent over four weeks in the intensive care unit and went into cardiac arrest at one point, which Anderson said lasted for about 10 minutes. Ferrell was then transferred to a long-term care facility and put on a respirator and dialysis, unable to speak or communicate.

The actress explained to TMZ in February that she had been hospitalized for a kidney infection in December in Charleston, West Virginia, where she had been living at her vacation home since Thanksgiving.

The infection grew worse as it spread and began to contaminate her blood, she shared. Ferrell spent weeks in the ICU before being released and put into transitional care in January. She spent the month bedridden as she recovered at home, going through physical therapy several times a day.

The actress told the outlet her husband was by her side throughout the ordeal and worked tirelessly to care for her.Charlie Sheen pays tribute to “Two and a Half Men” co-star Conchata Ferrell: “A heartbreaking and unexpected loss”

Actor Charlie Sheen paid tribute to his late co-star Conchata Ferrell, who played the role of Berta’s favorite on the hit sitcom “Two and a Half Men.” Ferrell passed away at the age of 77.Sheen posted a photo of herself and Ferrell on Twitter along with the captions: “A wonderful woman”, “A consummate professional actor”, and “A true friend. What a heartbreaking loss.” and surprise.”

Sheen and Ferrell starred together on “Two and a Half Men” from its first season in 2003 until Sheen left the show in 2011. Ferrell continued to appear on the show until its end in 2015.

Ferrell’s passing is considered a huge loss for “Two and a Half Men” fans and the acting community. Sheen’s tweet was a touching tribute to his talented and beloved co-star.