Congress leader Rahul Gandhi wished Dr. Manmohan Singh on his birthday, as the former PM turned 88 on Saturday.
Singh headed the UPA coalition government between 2004 and 2014.
"India feels the absence of a PM with the depth of Dr. Manmohan Singh. His honesty, decency and dedication are a source of inspiration for us all," Gandhi tweeted.
"Wishing him a very happy birthday and a lovely year ahead," he added with the hashtag 'HappyBirthdayDrMMSingh'.
The Congress, on its official Twitter handle, also tweeted, ‘a dedicated leader's primary aim is always to eradicate the evils that plague society in the soonest and surest possible way.’
"Today, we celebrate former Prime Minister Dr Manmohan Singh's commitment towards the overall well-being of each Indian," the party said.
In his journey towards greatness, he took a billion people along, the Congress said in another tweet.
"One of the most competent world leaders, Dr Manmohan Singh's vision for our nation is uncompromising. India is forever indebted to this great son for leading her through highs & lows," the party added.