The world is still mourning the colossal loss of actor Chadwick Boseman, who died at the age of 43 on Friday (August 28) following a four-year battle with colon cancer.

With many tributes from fans around the world being posted to social media, former US President Barack Obama and his wife Michelle have also paid their respects for the late Black Panther star.

Taking to Instagram, the former First Lady wrote the following tribute to her 41.8 million followers, recalling the moment she met Boseman, as well as praising the actor's talents.

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She wrote:

"I’ll always remember watching Chadwick in 42. Barack and I were alone in the White House, on a weekend night with the girls away.

"I was so profoundly moved by the rawness and emotion in the barrier-breaking story. And not long after, when he came to meet with young people in the State Dining Room, I saw that Chadwick’s brilliance on screen was matched by a warmth and sincerity in person.

"There’s a reason he could play Jackie Robinson, Thurgood Marshall, and King T’Challa with such captivating depth and honesty. He, too, knew what it meant to truly persevere. He, too, knew that real strength starts inside. And he, too, belongs right there with them as a hero—for Black kids and for all of our kids.

"There’s no better gift with which to grace our world."

Former President Barack Obama also shared a heart-warming post to the 21 Bridges star, praising his all the actor's achievements during the last four years. Obama wrote to his 31.6 million followers:

"Chadwick came to the White House to work with kids when he was playing Jackie Robinson. You could tell right away that he was blessed. To be young, gifted, and Black; to use that power to give them heroes to look up to; to do it all while in pain – what a use of his years."

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In another mark of respect for the actor, fans made his final tweet - the tragic announcement of his passing - the most 'Liked' post in Twitter history. As of this writing, over 7.5 million people have hit that heart in honor of the star.

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Our thoughts are with Boseman's family, friends, and fans at this time...

Both Barack and Michelle Obama pay tribute to Chadwick Boseman in heartwarming posts