A large majority of young people support gay marriage.

According to a survey released by pollster Gallup on Friday, 70 percent of adults under the age of 34 support giving gay and lesbian couples the right to marry.

The poll also found that a narrow majority (53%) of Americans support marriage equality, a first for the 15-year-old annual survey. Forty-five percent disagree, while two percent don't know.

Support dropped to 39% among adults 55 and older.

While the poll found large increases in support among Democrats (13%) and independents (10%), Republican support for the institution remained unchanged at 28 percent from last year.

“While big majorities of Democrats and young people support the idea of legalizing same-sex marriage, fewer than 4 in 10 Republicans and older Americans agree,” Gallup said in releasing its findings. “Republicans in particular seem fixed in their opinions; there was no change at all in their support level this year, while independents' and Democrats' support jumped by double-digit margins.”

An earlier poll conducted in the Roman Catholic stronghold of Spain, where gay marriage was legalized in 2005, found a super majority (77%) of teens in favor of gay marriage.