Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: "Big Bang Theory" star Kaley Cuoco and professional equestrian Karl Cook  are engaged   they  announced on social media.
 Cook  posted a video to Instagram on Thursday  Cuoco's 32nd birthday  depicting the actress with an engagement ring on  her  finger  in tears.
"Well after nearly two years I finally got up the courage to ask  her  to marry me. This is the best night of my life and I think the video shows it is the best night for Kaley as well...."  Cook  wrote in the caption.
This will be the second marriage for Cuoco  who split from tennis player Ryan Sweeting in 2015  nearly two years after their wedding. She and  Cook  were first linked in 2016.
I am so so so happy. Thank you @nadis_diamonds for making the greatest ring I could hope for. Absolutely brilliant. Thank you thank you A post shared by Karl Cook (@mrtankcook) on Nov 30  2017 at 7:30pm PST
In life  there is nothing like dancing right after getting engaged. The purity and grace of the moment are inexplicable  it is truly as though life were a balloon bouncing on the smoothest zephyr. Honey; all I want is to be a balloon bouncing  bobbing  and flowing through life together. You are my everything @normancook A post shared by Karl Cook (@mrtankcook) on Nov 30  2017 at 11:07pm PST
Who knew my prior post was oracular. Well after nearly two years I finally got up the courage to ask her to marry me. This is the best night of my life and I think the video shows it is the best night for kaley as well.....if she said yes!!!!! A post shared by Karl Cook (@mrtankcook) on Nov 30  2017 at 7:05pm PST

'Big Bang Theory' star Kaley Cuoco is engaged to Karl Cook