CREDIT: YouTube/Celebified

The "How I Met Your Mother" (HIMYM) finale scene with Lyndsy Fonseca and David Henrie that was filmed eight years ago in 2006 will finally air on Monday, March 31, 2014 at 8pm on CBS.

Fonseca and Henrie play Ted Mosby's children in the popular TV sitcom. But, they had to film the crucial HIMYM series finale scene in 2006 because they will look too old by the time it will be shown. Fonseca was only 18 years old when she first started appearing in "How I Met Your Mother" in 2005 while Henrie was only 16 years old at that time. Now, Fonseca is 27 years old and Henrie is 24 years old (He will turn 25 on July 11, 2014.) Check out the "How I Met Your Mother" pilot episode featuring Fonseca and Henrie back in the days.

CREDIT: YouTube/The Fedora Nerd

According to "How I Met Your Mother" co-creator Craig Thomas, he and Carter Bays filmed the HIMYM finale scene with Fonseca and Henrie which lasted for two minutes. They only had a cameraman and executive producer/director Pamela Fryman with them when they were shooting the scene. Henrie and Fonseca also signed nondisclosure agreements to guarantee that the details of the finale scene will never be divulged or spoiled to anyone.

Thomas hoped the scene will be shown in 2012, but HIMYM got extended for 2 more years after that so the showing of the important scene was also moved.

There were also some extra scenes filmed just to give "How I Met Your Mother" writers some options and flexibility for the final episode.

It has been revealed earlier that their mother is actress Cristin Milioti. Milioti previously appeared in "Once," "30 Rock," "The Good Wife" and "The Sopranos" and she can also be seen in the Leonardo Dicaprio and Martin Scorsese film "The Wolf of Wall Street" as the character Teresa Petrillo.

Bays and Thomas were also prepared in case HIMYM got cancelled abruptly and didn't last as long as their original plan of eight years for the show. They planned to make Fonseca and Henrie's mother as the baker character named Victoria that Ted met during the first season of the show.

Although Milioti's identity as Fonseca and Henrie's mother as well as Ted's wife in "How I Met Your Mother" has already been disclosed, fans are still wondering how exactly the two characters met and fell in love.

Actually, HIMYM series co-creators Craig Thomas and Carter Bays always knew how the show would end and how Ted and the mother will eventually meet, get married and have kids that will grow up as Fonseca and Henrie's teenaged versions in the year 2030.

"It's been the plan all along," said Thomas in a report from News.com.au.

"What you see on March 31 has been the plan. We leave the series with a certain message that we wanted to convey," he added.

The rest of the "How I Met Your Mother" actors including Neil Patrick Harris (Barney Stinson), Alyson Hannigan (Lily Aldrin), Cobie Smulders (Robin Scherbatsky), Jason Segel (Marshall Eriksen) and Josh Radnor who plays Ted Mosby, are scheduled to film the final episode on Feb. 28, 2014.

The ninth and final season of "How I Met Your Mother" is set entirely during the time of Barney and Robin's wedding weekend. Don't miss the "How I Met Your Mother" finale scene with Lyndsy Fonseca and David Henrie that was filmed eight years ago. It will air at 8pm on CBS on March 31, 2014. It will only last for an hour.

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