The Emmy and Golden Globe winner portrayed the late monarch in seasons three and four of the critically acclaimed Netflix series.
She shared her tribute with Variety and spoke highly of the Queen's successor, King Charles III.
"I wouldn’t know where to begin with that," she said when asked to share her thoughts about the Queen.
"She made a promise as a young woman and she absolutely kept it with such dignity. We’re all incredibly impressed by what she did".
When asked about her thoughts following the King's first televised public address, Coleman went on: "From a British point of view, he did it so beautifully."
She added: “He did it about love, tolerance and gentleness, and that is what she always wanted and she’s done.”
Upon his return to London after his mother's death, the King addressed the mourning nation and honoured her 'life of service'.
He assured the nation he would serve with 'loyalty, respect and love', saying: “As The Queen herself did with such unswerving devotion, I too now solemnly pledge myself, throughout the remaining time God grants me, to uphold the Constitutional principles at the heart of our nation.
“And wherever you may live in the United Kingdom, or in the Realms and territories across the world, and whatever may be your background or beliefs, I shall endeavour to serve you with loyalty, respect and love, as I have throughout my life.
Buckingham Palace confirmed on Friday (9 September) that a period of royal mourning will be observed for seven days after the Queen's funeral, which will take place on 19 September.
In seasons one and two, Claire Foy portrayed Queen Elizabeth from 1947 to 1964. In the upcoming fifth season of The Crown, Imelda Staunton will take on the role as the Queen, ushering in a new era for the royal family in the drama.
A representative for Netflix has confirmed to Tyla that filming has paused out of respect for Her Majesty. Production will also not take place on the day of the Queen's funeral.
The statement reads: "As a mark of respect, filming on The Crown was suspended today (9 September). Filming will also be suspended on the day of Her Majesty The Queen’s funeral."
Season five is expected to premiere in November.