Former first lady Nancy Reagan died of congestive heart failure at the age of 94 on Sunday.

The former Hollywood actress became one of the most influential first ladies in the U.S. while her Republican husband, Ronald Reagan, served his presidency from 1981 to 1989.

Nancy Reagan was famously known for her “Just Say No” campaign against illegal drug abuse in the 1980s.

Following her husband’s death in 2004 after a long battle with Alzheimer’s disease, Mrs. Reagan became an advocate for discovering a cure.

In addition to her son and daughter, Reagan is survived by her adopted stepson who posted on his Twitter account: “Nancy is where she has always wanted to be with her Ronnie… Now she is at peace…”

Mrs. Reagan will be buried at the Ronald Reagan Presidential Library in Simi Valley, California, next to her husband.

Former Israeli President Shimon Peres expressed deep sadness over the loss of Nancy Reagan: “Today I lower my head together with the citizens of the U.S. at the loss of first lady Nancy Reagan. Reagan was President Ronald Reagan’s dedicated wife, a true partner in the president’s unique leadership, including his strong friendship with Israel.”

“I recall her noble nature and fierce fight against drugs and alcohol among youth. During her time as first lady, Reagan would illuminate the White House with a big smile and open heart. I extend my most sincere condolences to the whole Reagan family, her friends and all citizens of the United States,” said Peres.

Likewise, Prime Minister Binyamin Netanyahu expressed his condolences, saying, ”I remember Nancy as a noble woman who supported her husband, President Ronald Reagan, and always stood by his side. She will be remembered as a great friend of Israel.”

By Shoshana Miskin/Arutz Sheva