Celebrity Mr. T Calls Working with Nancy Reagan on Her 'Just Say No' Campaign 'the Highlight of My Career' Mr. T shared an emotional tribute to the late first lady on Twitter, Monday By Lindsay Kimble Lindsay Kimble Lindsay Kimble is a Senior Digital News Editor and the Sports Editor for PEOPLE Digital. She's worked at PEOPLE for over seven years as a writer, reporter and editor across our Entertainment, Lifestyle and News teams, covering everything from the Super Bowl to the Met Gala. She's been nominated for the ASME NEXT Awards for Journalists Under 30, and previously wrote for Us Weekly while on staff at Wenner Media. People Editorial Guidelines Published on March 8, 2016 08:35 AM Share Tweet Pin Email Photo: Diana Walker/Time Life Pictures/Getty Together, Nancy Reagan and her husband, Ronnie , wrote a White House love story worthy of Old Hollywood. Subscribe now for an inside look at their extraordinary journey and 52-year marriage, only in PEOPLE! Tributes to the late Nancy Reagan continue to pour in from every corner of Hollywood following her death Sunday. One of the most heartfelt remembrances came from one of the former First Lady’s most unlikely costars. Star Mr. T, who partnered with the Reagan on her "Just Say No" campaign against drugs. “I mourn the death of First Lady Nancy Reagan, who was Very Special to me,” The A-Team star wrote on Twitter, Tuesday. “Not only did she invite me to the White House in December ’83, after meeting with her and President Ronald Reagan she then asked me to help her with her ‘Just Say No’ program which I gladly accepted with humility and honor.” Mr. T dressed in a Santa Claus suit to help unveil the White House Christmas decorations in 1983 – the event where the now-iconic snap of Reagan posed on his lap was taken. He continued on Twitter that working with the Reagans during the war on drugs “was the highlight of my career to be asked to work with the First Family on such a great cause.” The 63-year-old noted that his involvement “wasn’t political,” as he aligns with neither the Democratic or Republican parties but is “just a Christian Brother from the Hood trying to do some good!” “I will truly miss First Lady Nancy Reagan,” Mr. T wrote. “I will Never Forget her I will continue her work in trying to keep kids from the Dangers of Drugs. GOD Bless You First Lady.” Stars Pay Tribute to Former First Lady Nancy Reagan [BRIGHTCOVE “20992050” “” “peoplenow” “no” ]The stylish widow of former President Ronald Reagan died of congestive heart failure in her sleep. She was 94. Reagan will be buried in one of her signature red suits at the Ronald Reagan Presidential Library in Simi Valley, California. She will lie in repose at the library on Wednesday and Thursday, allowing the public to pay their respects. The closed-casket funeral service will be held at 11 a.m. on Friday.