Kunal Nayyar as Rajesh Koothrapali in 'TBBT'
Kunal Nayyar as Rajesh Koothrapali in 'TBBT'Facebook/ The Big Bang Theory

"The Big Bang Theory" star Kunal Nayyar is celebrating his 34th birthday on 30 April, along with co-star Johnny Galecki (40), who plays Leonard Hofstadter. Nayyar, who was born in London and raised in New Delhi, is now a successful actor in India.

Married to Miss India 2006 winner Neha Kapur, Nayyar struck gold as Rajesh Koothrapali in "TBBT". Raj for friends and family, the astrophysicist is mostly made fun of by the rest of the gang for being "too metrosexual", being always in touch with his emotions and the excessive love he showers on his dog.

Here are some of the best Raj quotes from the CBS show that makes him the most adorable in the gang:

The Pork Chop Indeterminacy (Season 1 Episode 15)

Raj Koothrappali: Have you ever heard of the Kama Sutra?
Missy: The sex book.
Raj Koothrappali: The Indian sex book. In other words, if you've ever wondered, wondered who wrote the book of love... it was us.

The Vegas Renormalization (Season 2 Episode 21)

Sheldon Cooper: You know, I'm given to understand that there is an entire city in Nevada designed specifically to help people like Howard forget their problems. They replace them with new problems, such as alcoholism, gambling addiction, and sexually-transmitted diseases.
Raj Koothrappali: Is it me, or was that Sheldon's way of saying "Vegas, baby!"?

The Pirate Solutions (Season 3 Episode 4)

Leonard Hofstadter: I've always been a little confused about this. Why don't Hindus eat beef?
Raj Koothrappali: We believe cows are gods.
Sheldon Cooper: Not technically. In Hinduism, cattle are thought to be *like* god.
Raj Koothrappali: Do not tell me about my own culture, Sheldon! In the mood I'm in, I'll take you out - I swear to cow!

The Engagement Reaction (Season 4 Episode 23)

Leonard Hofstadter: It's nice that they're getting along.
Raj Koothrappali: Your girlfriend and your ex-girlfriend hang out together? Oh yeah. That can only be good for you.
Leonard Hofstadter: What are you talking about?
Raj Koothrappali: One of them broke up with you; do you really want her telling the other one why?
Leonard Hofstadter: I don't care. I don't have anything to hide.
Raj Koothrappali: Good, good. Then you've nothing to worry about.
Leonard Hofstadter: No. I do not. [pauses] You are a mean little man!
Raj Koothrappali: You'd think it'd be because my parents didn't love me, but actually they loved me a great deal.

The Wiggle Finger Catalyst (Season 5 Episode 4)

Penny: This girl is trouble! What kind of relationship is it where you buy her gifts, and she gives you sex?
Raj Koothrappali: The best one I ever had!

The 43 Peculiarity (Season 6 Episode 8)

Howard Wolowitz: I wonder what Sheldon's hiding in there?
Raj Koothrappali: He's always been kind of a weirdo. Maybe he's got Leonard Nimoy chained up in there. Or Bill Gates or Stephen Hawking.
Howard Wolowitz: Why would he chain up Stephen Hawking?
Raj Koothrappali: Howard, shame on you! You can't treat him differently just because he's disabled, that's not okay!

The Cooper Extraction (Season 7 Episode 11)

Leonard Hofstadter: Hey, Sheldon sent us all an email. "Happy Holidays from Texas". And there's pictures. Arrgh, don't open them, do not open them.
Penny: Oh, come on, child birth is a natural, beautiful... [sees picture] urgh, it's like someone sawed a cow in half.
Raj Koothrappali: My father's a gynecologist; I think I can handle it. [sees pictures] Ehhh, now I'm gay.

The Champagne Reflection (Season 8 Episode 10)

Raj Koothrappali: When stuff like this gets me down, you know what I like to do?
Howard Wolowitz: Sing "Hakuna Matata" like an eight-year-old girl?
Raj Koothrappali: Wrong, smarty-pants. It's "Everything Is Awesome" from The Lego Movie.