Jessica Miglio/20th Century Fox
"Unfinished Business," about a small-business owner (Vaughn) trying to land a big deal mixed in with hijinks across Europe, debuted to $4.8 million at theaters.
Analysts expected the film to tank, making between $5 million and $6 million upon debut.
The film received terrible reviews for being downright unfunny and unfocused.
The movie had a reported $35 million production budget.
"Unfinished Business" is the actors latest comedic bomb at the box office.
After a string of big hits through 2009, Vaughn's last four films have flopped upon entry.
Here's a quick look back at Vaughn's wide releases since 2005's "Wedding Crashers" with Owen Wilson:
| Movie | Opening Weekend | Worldwide Gross | Estimated Budget |
| "Wedding Crashers" (2005) | $33.9 million | $285.2 million | $40 million |
| "The Break-Up" (2006) | $39.2 million | $205 million | $52 million |
| "Fred Claus" (2007) | $18.5 million | $97.8 million | n/a |
| "Four Christmases" (2008) | $31 million | $163.7 million | $80 million |
| "Couples Retreat" (2009) | $34.3 million | $171.8 million | $70 million |
| "The Dilemma" (2011) | $17.8 million | $69.7 million | $70 million |
| "The Watch" (2012) | $12.8 million | $68.3 million | $68 million |
| "The Internship" (2013) | $17.3 million | $93.5 million | $58 million |
| "Delivery Man" (2013) | $7.9 million | $51.2 million | $26 million |
| "Unfinished Business" (2015) | $4.8 million | n/a | $35 million |
Unless Vaughn's with another leading star - Jennifer Aniston in "The Break-Up" or Reese Witherspoon in "Four Christmases" - he doesn't bring a big audience on his own.
The 44-year-old actor's next big role will be on season 2 of HBO's hit "True Detective" which will also star Colin Farrell and Rachel McAdams.
The role comes at a dire time when Vaughn's role as a viable standalone movie star is going to be heavily scrutinized after several flops in a row.