Many netizens professed surprise yesterday when it was announced that Girls Generation singer and actress Yoona was dating actor Lee Seung Gi, making them the first official celebrity couple of the year.

But those who have observed the two closely over the years might have seen it coming.

Here are five reasons that we should have known Yoona might wind up dating Lee Seung Gi.

He named her his ideal type more than once. That in itself is not a giveaway because the beautiful singer is the ideal type of many celebrities, including "Empress Ki" actor Joo Jin Mo, 2 AM's Jo Kwon, 2PM's Chansung, Junho, Taecyeon and Nickhun, Infinite's Hoya, Jay Park, Jang Geun Suk and actor Jung Woo Sung, just to name a few. But when she heard that he had chosen her she said, "I felt the happiest that he picked me as his ideal."

After the first time he said was his ideal type, he was asked if he still liked her on a later variety show.

Girls Generation's YoonA & Lee Seung Gi. No Wonder They're Dating! [PHOTO GALLERY]

He said, "I like her so much it's killing me."

When he knew she was going to be on the variety show "Strong Heart" with her, he blushed and said, "I'm so excited I could die." He also said that working with her worried him.

But she did not understand his concern. She assumed that he was worried because she had a habit of saying random things that confused people.

4. When she said on "Strong Heart" that her ideal guy would make her heart beat by doing things like ruffling her hair, he later gently patted her head. Every heart in the audience beat a little faster.

Although Yoona's ideal types have included actors Daniel Henney, Yun Jung Hoon and Japanese singer and actor Kimura Takuya, she never dated any of them. Yun Jung Hoon is married to Han Ga In and neither Daniel Henney nor Kimura Tayuya asked her. In fact, despite being the ideal type of so many celebrities, the "Prime Minister and I" star has stated that none of them ever asked her out. Until Lee Seung Gi that is.

So far the two seem to be taking things slow. Although they have dated since September, he always brings her home before 1 a.m. He buys her gifts and they were spotted taking a romantic stroll along the Han River.

"Lee Seung Gi and Yoona are dating but they are still getting to know each other," said an SM Entertainment representative when confirming their relationship.

After having a crush on Yoona for so long, Lee Seung Gi must be one happy man.