Tamsin Greig paid tribute to her late Friday Night Dinner co-star Paul Ritter.
Harry Potter And The Half-Blood Prince star Paul died aged 54 at home after a battle with a brain tumour.
They played husband and wife on Channel 4 comedy Friday Night Dinner.
In an overflow of loving words, Tamsin hailed her late co-star for his "enormous courage" and "effort".
Weeks before he died, the pair reunited to collaborate for BBC Radio 4 Meet Me at the Museum.
She wrote in The Guardian : "It took enormous courage and effort for him to record the drama remotely from his home when he was so ill, and I am honoured that he so willingly agreed to do it. It is a fine legacy and tribute to his artistry, and a gift of time and experience that I will treasure."
Tamsin gushed how her friend was "deeply beloved" and she drew attention to his best qualities from his kindness to his devotion to his family.
On a sad note, she said the world was a "less brilliant place" without her friend in it.
She added: "I am eternally grateful that our paths crossed. His kindness, attention to detail and phenomenal memory, his passion for music and football, his devotion to his beautiful family, his complete inability to accept a compliment, and his quiet, loyal, compassionate friendship will stay with me for ever.
"The world is a less brilliant place without Paul in it. Go lightly, my friend. You are deeply beloved."
The sad news of Paul's death was revealed on Tuesday.
“It is with great sadness we can confirm that Paul Ritter passed away last night,” his agent confirmed.
“He died peacefully at home with his wife Polly and sons Frank and Noah by his side. He was 54 and had been suffering from a brain tumour.
“Paul was an exceptionally talented actor playing an enormous variety of roles on stage and screen with extraordinary skill. He was fiercely intelligent, kind and very funny. We will miss him greatly.”
