His widow Janette passed away in 1970, aged 92.
He was mentioned in dispatches for his service in World War I.
He was an accomplished watercolor artist and embroiderer (and even published a book entitled 'Adventures in Embroidery').
He was awarded a CBE (Commander of the Order of the British Empire) in 1960 for his services to drama.
His famous role of mad scientist Dr. Pretorius in The Bride of Frankenstein (1935) was initially turned down by Bela Lugosi. Universal wanted Claude Rains then to do the part but director James Whale insisted on Thesiger.