diff --git a/erpnext/crm/doctype/opportunity/opportunity.py b/erpnext/crm/doctype/opportunity/opportunity.py
index fc205343924..676da31a63a 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.py
+++ b/erpnext/crm/doctype/opportunity/opportunity.py
@@ -8,7 +8,7 @@ import frappe
 from frappe import _
 from frappe.email.inbox import link_communication_to_document
 from frappe.model.mapper import get_mapped_doc
-from frappe.utils import cint, cstr, get_fullname
+from frappe.utils import cint, get_fullname
 
 from erpnext.accounts.party import get_party_account_currency
 from erpnext.setup.utils import get_exchange_rate
@@ -193,20 +193,20 @@ class Opportunity(TransactionBase):
 
 		if self.party_name and self.opportunity_from == "Customer":
 			if self.contact_person:
-				opts.description = "Contact " + cstr(self.contact_person)
+				opts.description = f"Contact {self.contact_person}"
 			else:
-				opts.description = "Contact customer " + cstr(self.party_name)
+				opts.description = f"Contact customer {self.party_name}"
 		elif self.party_name and self.opportunity_from == "Lead":
 			if self.contact_display:
-				opts.description = "Contact " + cstr(self.contact_display)
+				opts.description = f"Contact {self.contact_display}"
 			else:
-				opts.description = "Contact lead " + cstr(self.party_name)
+				opts.description = f"Contact lead {self.party_name}"
 
 		opts.subject = opts.description
-		opts.description += ". By : " + cstr(self.contact_by)
+		opts.description += f". By : {self.contact_by}"
 
 		if self.to_discuss:
-			opts.description += " To Discuss : " + cstr(self.to_discuss)
+			opts.description += f" To Discuss : {frappe.render_template(self.to_discuss, {'doc': self})}"
 
 		super(Opportunity, self).add_calendar_event(opts, force)
 
diff --git a/erpnext/crm/doctype/opportunity/test_opportunity.py b/erpnext/crm/doctype/opportunity/test_opportunity.py
index cfe267c60c6..cd4ede2ab9c 100644
--- a/erpnext/crm/doctype/opportunity/test_opportunity.py
+++ b/erpnext/crm/doctype/opportunity/test_opportunity.py
@@ -4,7 +4,7 @@
 import unittest
 
 import frappe
-from frappe.utils import random_string, today
+from frappe.utils import add_days, now_datetime, random_string, today
 
 from erpnext.crm.doctype.lead.lead import make_customer
 from erpnext.crm.doctype.opportunity.opportunity import make_quotation
@@ -58,6 +58,22 @@ class TestOpportunity(unittest.TestCase):
 		self.assertEqual(opp_doc.opportunity_from, "Customer")
 		self.assertEqual(opp_doc.party_name, customer.name)
 
+	def test_render_template_for_to_discuss(self):
+		doc = make_opportunity(with_items=0, opportunity_from="Lead")
+		doc.contact_by = "test@example.com"
+		doc.contact_date = add_days(today(), days=2)
+		doc.to_discuss = "{{ doc.name }} test data"
+		doc.save()
+
+		event = frappe.get_all(
+			"Event Participants",
+			fields=["parent"],
+			filters={"reference_doctype": doc.doctype, "reference_docname": doc.name},
+		)
+
+		event_description = frappe.db.get_value("Event", event[0].parent, "description")
+		self.assertTrue(doc.name in event_description)
+
 
 def make_opportunity(**args):
 	args = frappe._dict(args)