( CNN ) -- There did n't seem to be too much that Robin Williams could n't do . As an actor , he had the range to go from playing a loveable alien on the small screen in `` Mork & Mindy '' to winning an Academy Award for his portrayal of Professor Sean Maguire in `` Good Will Hunting . '' Whether it was spastic slapstick or heart-rending drama , the actor , who died on Monday from an apparent suicide , was as prolific in his career as he was hilarious . Evidence of that work ethic wo n't end with his death . There are four completed Williams films expected to be released posthumously : `` Night at the Museum : Secret of the Tomb , '' `` Merry Friggin ' Christmas , '' `` Boulevard , '' and `` Absolutely Anything . '' Given his love for his craft and his fans , the final work feels like a gift left behind by the beloved actor . Williams was known for taking on as many projects as he possibly could . In a 2010 interview with The Guardian , the actor said heart surgery in 2009 helped him to ease his pace a bit . `` In one two-year period I made eight movies , '' Williams reflected . `` At one point the joke was that there 's a movie out without you in it . You have this idea that you 'd better keep working , otherwise people will forget . And that was dangerous . And then you realize , no , actually if you take a break people might be more interested in you . Now , after the heart surgery , I 'll take it slow . '' Gilbert Gottfried : Robin Williams ' generous heart . Set for release in December , `` Night at the Museum : Secret of the Tomb '' saw Williams revisiting his role of Teddy Roosevelt , which he had portrayed in earlier films in the series . `` There really are no words to describe the loss of Robin Williams , '' said a statement from 20th Century Fox , the studio behind the movie . `` He was immensely talented , a cherished member of our community , and part of the Fox family . Our hearts go out to his family , friends and fans . He will be deeply missed . '' Complete coverage on Robin Williams . Williams also completed a role in the holiday comedy `` Merry Friggin Christmas , '' which is set to be released in November . The film centers around father Boyd Mitchler , played by Joel McHale , who realizes he has left behind his son 's gifts while on holiday with his estranged family . Williams stars as McHale 's father , who makes the trek with him to retrieve the presents in time . `` When you talk to Robin you think , ' I have learned more in the last 20 minutes than I ever learned , ' '' McHale told the New York Daily News earlier this year . `` He is such an open soul and one of the most sensitive and great guys ... '' Known for his voice work in films like Disney 's `` Aladdin , '' Williams provided the voice of Dennis the Dog in `` Absolutely Anything , '' which will be released in 2015 and costars Kate Beckinsale and Simon Pegg . But it is his role in the drama `` Boulevard , '' which premiered at the Tribecca Film Festival in April , that may become the most discussed and heralded of Williams ' final films . Robin Williams and the dark side of comedy . In it , Williams plays a married man who comes to terms with his homosexuality later in life and connects emotionally with a young male prostitute played by Roberto Aguire . `` Tapping into that same loneliness felt in 'One Hour Photo ' and 'Good Will Hunting , ' the actor projects a regret so deep and identifiable , viewers should have no trouble connecting it to whatever is missing in their own lives â€ ” whether those regrets are romantic , sexual , professional or spiritual , '' critic Peter Debruge wrote in a review of the movie for Variety . During a Reddit `` Ask Me Anything '' session with fans in 2013 , Williams said he could n't choose between comedies or dramas . `` I like doing both comedies and dramas , so it 's very difficult to say which one I prefer , '' he said . `` I 've been very blessed to have had the chance to explore such a variety of characters . '' See more comedy content at CNN Comedy .
Some are holiday films , including latest in ` ` Night at the Museum '' series . Williams was known for working on as many projects as he possibly could . Williams said he could n't choose between comedy and drama .