Jake Gyllenhaal-bi
Colin Farrell-bi, lean straight
Hugh Jackman-bi, lean gay
Matthew Perry-straight (but bi-curious

)
Matthew Broderick-gay
Josh Hartnett-bi, lean straight
Orlando Bloom-bi, lean gay
George Clooney-bi
Sean William Scott-bi, lean straight
Johnny Depp-straight (but bi-curious)
Matt Dillon-straight (...you get my drift)
Matthew McConaughey-straight
Justin Timberlake-gay gay gay
Ryan Seacrest-gay
Brad Pitt-bi
Hayden Christensen-bi
Ryan Phillippe-striaght (")
Matt Damon-straight (")
Jared Leto-straight (")
Tom Cruise-gay
Kevin Spacey-gay
John Travolta-gay
Matt LeBlanc-straight
Jeremy Piven-straight (")
Richard Gere-bi
Eddie Murphy-bi, lean gay
Terrence Howard-bi, lean gay
Jude Law-bi
Will Smith-bi, lean straight
Harisson Ford-straight (")
David Schwimmer-straight (")
Ben Affleck-bi, lean straight
So basically I am one of the type who believes in the sexuality spectrum where basically everything is fluid. Of course there will be exceptions to the rule where people are, or at least seem to be, 100% straight/gay/bi, but that is extremely rare, and often is just how they want to appear. I do think in general people are all to some degree bisexual; whether they define themselves as that though is another question. More like "I identify as straight (but...)"