Hard to believe it has been almost 75 years since ditzy flapper Blondie Boopadoop fell for bumbling Dagwood Bumstead in a love match made in the funny papers.

In those days, Dagwood was a rich playboy whose snooty parents greatly disapproved of the union. When he and Blondie married in 1933, the J. Boling Bumsteads disinherited their son, relegating him to a modest suburban life of raising kids, carpooling, battling blowhard boss Mr. Dithers and making really big sandwiches.

Now one of the most famous married couples in the world in one of the most widely read strips in history, Blondie and Dagwood are celebrating the comic's milestone anniversary this summer in a running story line featuring cameos from their comics-page cohorts, whose creators also will pay tribute to "Blondie" by inviting the happy couple into their own panels.

Garfield, Beetle Bailey, Hagar the Horrible, baby Marvin, Dennis the Menace, Dilbert, Jeremy from "Zits" and others -- a virtual who's who of the funnies -- will drop in and out as the Bumsteads plan a huge party for an unspecified anniversary to be celebrated in the Sunday comics Sept. 4. President Bush and wife Laura are also set to make an appearance.

Introduced by cartoonist Murat Bernard "Chic" Young on Sept. 8, 1930, "Blondie" is now written seven days a week by his son, Dean, who took over when his father died in 1973, and artist Denis Lebrun. Before Lebrun became head artist in 1997, Dean Young had worked with two other artists: Jim Raymond and then Stan Drake.

Reaching about 250 million readers in more than 2,000 newspapers in 55 countries, "Blondie" ranks among the top five most popular strips in newspaper comics surveys year in and year out.

"It's survival of the funniest -- it's like Darwinian evolution on the comics page," says "Hagar the Horrible" cartoonist Chris Browne. "It's such a funny strip. Humor really comes out of honesty, and there's a lot of honesty and lot of stuff we recognize in 'Blondie.' "

The Bumsteads have been depicted on a U.S. postage stamp, featured in a Library of Congress exhibit and inspired movies and a TV series. An overstuffed sandwich is known in the pop culture lexicon -- as well as in Webster's dictionary -- as a "Dagwood." "Blondie" is an American institution, translated into more than 30 languages.

"God bless my daddy," the jovial Young says in an interview in his Clearwater Beach studio. "He was the genius who created this wonderful menagerie of characters. A monkey could do my job with the characters I have to work with. He left me this cast of characters and this dominant gene."

Dean Young, 65, has shepherded the Bumsteads through myriad modern travails and family upheavals, including Blondie going off to work in her own successful catering business, a plot twist that made international headlines in 1991.

Twice in 75 years, though, it looked as if "Blondie" could go the way of "Terry and the Pirates" and "Krazy Kat" into comics oblivion. The first time, during the Depression when hard-luck Americans tired of the flapper comics of the day, Chic Young solved the problem by having Blondie and Dagwood marry and transition to a life of domesticity.

The second rough patch came in 1973, when Chic Young died of emphysema. Some 600 newspapers dropped the strip on that basis, despite Dean Young taking over after working alongside his dad for a decade. He rescued "Blondie" that time by modernizing the characters' situations and the Bumsteads' marriage, eventually getting back the papers he lost and adding 700 more.

Cartoon characters have been known to cameo in one another's strips from time to time, but nothing like what's happening in this summer's tribute. Browne notes that Hagar the Viking will have to travel 1,000 years through time to show up at the Bumsteads' gala. Garfield, of course, will be looking forward to the food.

"It's a way we get to pay homage to 'Blondie' and to Dean for their status," says "Garfield" cartoonist Jim Davis. "It also gives a nod to the comics as a community. These characters could all be neighbors. They look a little different, but we all look a little different, too."

Dagwood married Blondie in 1933.Dean Young took over writing the popular strip after his father, Chic Young, died in 1973.