"20/20" anchor Elizabeth Vargas, who has struggled openly with alcoholism, has checked herself into rehab.

"As so many other recovering alcoholics know, overcoming the disease can be a long and incredibly difficult process," Vargas, 51, said in a statement. "I feel I have let myself, my co-workers and most importantly my family down and for that I am ashamed and sorry. I am committed to battling and addressing this debilitating disease and want to thank everyone who has offered their unwavering support during this trying time."

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"Nothing is more important than Elizabeth's health and well-being and we stand squarely behind her," the ABC news division said in a statement.

Vargas, who has spent previous time in rehab, spoke of her alcohol addiction on "Good Morning America" in January.