Before you can start cracking those "too much bacon" jokes, his new look is obviously due to prosthetics and makeup. On April 15, the actor was looking lean as ever at the Adult Beginners premiere in Hollywood, Calif.
Kevin Bacon through the years
Kevin Bacon's bloated face is unrecognizable -- see the pic!
Actor Kevin Bacon poses for a portrait during the Variety Studio powered by Samsung Galaxy at Palihouse on May 29, 2014 in West Hollywood, California (Photo by Jonathan Leibson/Getty Images for Variety)
Los Angeles, CA Kevin Bacon at the premiere of Brad Pitt's new movie 'Fight Club' in 1999. (Photo Brenda Chase Online via Getty Images)
Kevin Bacon and his wife, Kyra Sedgwick attend a 'Learning Leaders' performance in New York City, April 3, 2000. (Photo by Chris Hondros)
Kevin Bacon at An all-star Tribute to Johnny Cash scheduled to air on TNT April 18, 1999/ Hammerstein Ballroom, NYC NY (Photo Scott Gries/ImageDirect)
Kevin Bacon Stars In 'Hollow Man' Which Will Appear In Theaters August 4, 2000. (Photo By Getty Images)
Actor Kevin Bacon participates in an Earth Day 2002 event at the United Nations April 22, 2002 in New York City. Bacon was one of numerous celebrities who joined environmental activists at the UN to highlight the upcoming World Summit on Sustainable Developent to be held in Johannesburg, South Africa. Earth Day, which has been observed for 32 years, has become a day of rallies, cleanups, workshops and tree plantings all aimed at drawing attention to the environmental state of the planet. (Photo by Spencer Platt/Getty Images)
US actor Kevin Bacon poses for photographers on a terrace of the palais des festivals during the photocall for the film 'Mystic river' by US director Clint Eastwood during the 56th Cannes film festival 23 May 2003. The film, starring Tim Robbins, is in competition for the Golden Palm. AFP PHOTO FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
PARK CITY, UT - JANUARY 19: Actress Kyra Sedgwick and actor Kevin Bacon speak at a press conference for the film 'The Woodsman' during the 2004 Sundance Film Festival January 19, 2004 in Park City, Utah. (Photo by Mark Mainz/Getty Images)
CANNES, France: US actor Kevin Bacon and his actress wife Kyra Sedgwick arrive for the official projection of French director Agnes Jaoui's film 'Comme Une Image', 16 May 2004 at the Cannes Film Festival. Jaoui's film is in competition for the festival's top prize, the Palme d'Or. AFP PHOTO/BORIS HORVAT (Photo credit should read BORIS HORVAT/AFP/Getty Images)
Actor Kevin Bacon presents at the 2004 IFP Gotham Awards at Pier Sixty December 1, 2004 in New York City. (Photo by Evan Agostini/Getty Images)
TORONTO, ON - SEPTEMBER 13: Kevin Bacon attends the Toronto International Film Festival for the film ''Where the Truth Lies' on September 13, 2005 in Toronto, Canada. (Photo by Jim Ross/Getty Images)
NEW YORK - DECEMBER 10: Actor Kevin Bacon arrives for a screening of the new movie Letters From Iwo Jima at the Time Warner Center December 10, 2006 in New York City. (Photo by Scott Wintrow/Getty Images)
BEVERLY HILTON, CA - JANUARY 11: Actors Kevin Bacon (L) and Kyra Sedgwick arrive at the 66th Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 11, 2009 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - MAY 12: Kevin Bacon (L) and Kyra Sedgwick (R) attend Game Five of the Western Conference Semifinals during the 2009 NBA Playoffs at Staples Center on May 12, 2009 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
NEW YORK, NY - MAY 25: Actor Kevin Bacon attends the 'X-Men: First Class' New York Premiere at the Ziegfeld Theatre on May 25, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)
NEW YORK, NY - JUNE 09: Actor and musician Kevin Bacon attends the GQ+A, an evening of conversation and Inspiration with GQ Editor-At-Large, Michael Hainey, powered by Montblanc at Neuehouse on June 9, 2015 in New York City. (Photo by Neilson Barnard/Getty Images for GQ)
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Bacon has yet to explain his odd new look, though the Daily Mail points out that The Following star is the face of UK's movie and television service company, EE, and has been known to make fun of himself in past advertising campaigns.
Check out ET's amazing flashback video below, when we caught up with Bacon all the way back in 1984