Sir Patrick Stewart's widow Sunny Ozell has paid tribute to the Star Trek actor two weeks after his death at the age of 86, saying "the grief continues to come in waves".

Sir Patrick died on October 28 following a "brief and poignant journey with Alzheimer's disease and Lewy body dementia", a statement on his social media said.

US singer-songwriter Ozell, who married the award-winning actor in 2013, has shared a touching tribute to her late husband on Instagram, saying they "left nothing unsaid".

She wrote: "Today marks two weeks since Patrick passed, and the grief continues to come in waves.