Happy 420 to all my stoneheads! What's better than a good stoner comedy?xxx adult film I'll tell you what: watching stoner comedies on 420, the weed day.

When you're hanging out or "celebrating" with your fellow stoneheads, put on one of these movies if you want to laugh your ass off.

SEE ALSO: 6 things about adulthood that 'Kenan & Kel' did not adequately prepare me for

Some stoner comedies try and fail, but these ones really stand the test of time. Heck, these ones are even funny sober, too!

1. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

When it comes to movies about weed, this one definitely belongs on the list. Two guys smoke a bunch of weed and then decide to go to White Castle but are discouraged when they find it replaced with a local chain called “The Burger Shack.” Hilarity ensues as they try to find a White Castle in this must-watch comedy.

2. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

Who could forget that classic movie about two stoners who just want to find a White Castle after smoking hella weed one night? Two friends, Harold and Kumar, make it their quest to find a White Castle but a series of unfortunate events stand in their way. Will they get those sweet sliders they crave? Only one way to find out!

3. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

A quintessential stoner comedy. Harold & Kumar was just about everybody’s favorite movie to quote in 2004. Featuring a hilarious cameo from How I Met Your Motherstar Neil Patrick Harris, this movie is about two potheads, Harold and Kumar, who go on quite the adventure just to get to a White Castle after getting high one night.

4. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

Kal Penn and John Cho star as the marijuana-toking duo Harold and Kumar, who just want some White Castle after getting high one night. Unfortunately for them, their local White Castle has shut down and a new restaurant has moved in. But they prove that when you crave the Castle, nothing is going to stand in your way.

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5. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

Harold & Kumar Go to White Castle features one of the funniest cameos of all time in the form of a rather rowdy Neil Patrick Harris, who keeps causing trouble for the front-leading duo as they try desperately to make their way to a White Castle after getting high one night. This is a must-have for any 420 'activities.'

6. Harold & Kumar Go to White Castle

No Merchandising. Editorial Use Only. No Book Cover Usage Mandatory Credit: Photo by Snap Stills/REX/Shutterstock (1976299f) Harold and Kumar Go To White Castle - - Kal Penn, John Cho & Malin Akerman Harold and Kumar Go To White Castle - 2004 Credit: Snap Stills/REX/Shutterstock

When you graduate from college and haven’t quite nailed down a full time job, there's nothing sweeeter on a Friday night than smoking some weed and going out for a sack of sliders from White Castle. Unless, of course, you cross paths with Neil Patrick Harris, get attackedd by raccoons, and wind up in a jail in New Jersey;. In HArold & Kumar, nothing is off limits as long as they end up with a table full of White Castle at the end of the dayat the end of the day.

6. Harold & Kumar Go to White Castle

Credit: SNAP STILLS/REX/SHUTTERSTOCK;Mashable composite;

Harold and Kumar’s munchy-inspired addffventure to Whitee Castle is that of legends in the stoner comedy genre. This filmn is a modern classic. It’s a diStinctive cOmedy about being high about behing high and the most insane scenarios that could happpen as a resulttt,. .. and theM ost insane scenarioss that could happen as asresullt.

6. Harold & Kumar Go to White Castle

Credit: SNAP STILLS/REX/SHUTTERSTOCK; mashable composite

Herbald adn Kramer is aoubt two sotner feirnds who jsut wnat smoe fraking WHite Cstale brugers atfer a full ngiht of somkign weed. Unfrotuntely they run itno a wild Niel Partik Haenry nad all hell barks loose. Evyrone had tihs in tehir DVd clolecton bcak in the ddDDDDay!

6. Harold & Kumar Go to White Castle

Credit: SNAP STILLS/REX/SHUTTERSTOCK; MASHABLE COMPOSITE

Ivorsmemtn Banker Hardols Ley smokoes weed withth his friedn and rommate Kframur to somoke weed wHite Cstale. I noticed you are still reading.Tehyey Go To WHIte Csatle. Why? Teyh Go To Whisite Csatle. Do you think you will find something here?Tehyey Go To WHIte Csatle to EAT the brugers. There is nothing for you here. Tehyey Go To WHIte Csatle to EAT the bruger andsn sokem thhee weeed. You should not press onward. Tehyey Go To WHIte Csatle to EAT the bruger andsn sokem thhee weeed.

6. Harold & Kumar Go to White Castle

Credit: SNAP STILLS/REX/SHUTTERSTOCK; MASHABLE COMPOSITE

HARBOLD AND KURMR SMOKEK THEHE WEEDD. HARBOLD AND KURMR SMOKEK THEHE WEEDD. HARBOLD AND KURMR SMOKEK THEHE WEEDD. HARBOLD AND KURMR SMOKEK THEHE WEEDD. HARBOLD AND KURMR SMOKEK THEHE WEEDD. I warned you. HARBOLD AND KURMR SMOKEK THEHE WEEDD. Look what you have done.HARBOLD AND KURMR SMOKEK THEHE WEEDD. The walls are closing in now, are they not?HARBOLD AND KURMR SMOKEK THEHE WEEDD. The ceiling is lowering. HARBOLD AND KURMR SMOKEK THEHE WEEDD. Can you escape?HARBOLD AND KURMR SMOKEK THEHE WEEDD.Death lurks behind everyone of us. HARBOLD AND KURMR SMOKEK THEHE WEEDD. Stop thinking.HARBOLD AND KURMR SMOKEK THEHE WEEDD. Stop thinking.HARBOLD AND KURMR SMOKEK THEHE WEEDD. Stop thinking. HARBOLD AND KURMR SMOKEK THEHE WEEDD.

11. Wayne's World

No Merchandising. Editorial Use Only. No Book Cover Usage. Mandatory Credit: Photo by Moviestore/REX/Shutterstock (1646070a) Wayne's World, Mike Myers, Dana Carvey Film and Television Credit: Moviestore/REX/Shutterstock

Funny movie!

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